Websphere Application Server Liberty
Monthly
Authentication bypass in IBM WebSphere Application Server Liberty (versions 17.0.0.3 through 26.0.0.8) allows remote attackers to circumvent authentication controls when the rtcomm-1.0 or rtcommGateway-1.0 feature is enabled, exposing protected real-time communication functions. The CVSS 3.1 base score is 9.4 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:L), reflecting high confidentiality and integrity impact reachable over the network without credentials. A vendor patch is available; there is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV.
Privilege escalation in IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 allows an authenticated low-privileged user to gain unauthorized access to protected data and functionality when the Liberty collectives feature is in use. The CVSS vector (AV:N/AC:L/PR:L/UI:N) confirms network-exploitable, low-complexity exploitation requiring only low-level authentication with no user interaction - resulting in high confidentiality and integrity impact. No public exploit or CISA KEV listing has been identified at time of analysis; a vendor-released patch is available.
Unsafe class loading in the ORB (Object Request Broker) component of IBM WebSphere Application Server 8.5, 9.0, and Liberty Continuous Delivery allows a malicious or attacker-controlled IIOP server to force a WebSphere client/server to load and instantiate arbitrary Java classes over the network. Exploitation requires no authentication or user interaction (CVSS 9.8), and successful abuse can lead to loss of confidentiality, integrity, and availability, potentially culminating in remote code execution via dangerous class instantiation. There is no public exploit identified at time of analysis, and EPSS estimates only a 0.44% probability of exploitation in the next 30 days.
Denial of service in IBM WebSphere Application Server (9.0, 8.5) and WebSphere Application Server Liberty (17.0.0.3 through 26.0.0.7) lets remote unauthenticated attackers exhaust server resources by sending a single crafted HTTP request, forcing the application server to become unresponsive. The flaw (CWE-400, uncontrolled resource consumption) carries CVSS 7.5 with a full availability impact and requires no privileges or user interaction, making it trivially reachable on any exposed HTTP listener. There is no public exploit identified at time of analysis, but a vendor patch is available from IBM.
Security constraint bypass in IBM WebSphere Application Server 8.5/9.0 (Traditional) and WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.7 allows a remote, unauthenticated attacker to circumvent access controls and reach protected resources, resulting in disclosure of confidential information (CVSS 3.1 base 7.5, C:H). The flaw stems from an authentication-bypass-by-alternate-name weakness (CWE-289) in how the server evaluates security constraints. IBM has released a fix; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Uncontrolled memory consumption in IBM WebSphere Application Server Liberty (versions 17.0.0.3 through 26.0.0.7) lets a remote attacker crash or degrade the server by sending a single specially crafted request that forces excessive memory allocation. The flaw is network-reachable and requires no authentication or user interaction (PR:N/UI:N), and IBM (the reporter) has released a fix. There is no public exploit identified at time of analysis, and no EPSS or CISA KEV data was provided.
Cross-site request forgery in IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 enables server-side request forgery with elevated privileges when the collectiveController-1.0 feature is active. An attacker who lures an authenticated Liberty administrator to a malicious web page can trigger forged requests that the server executes with the victim's elevated privileges, allowing the attacker to reach internal services ordinarily inaccessible from the network perimeter. No public exploit code exists and no confirmed active exploitation is recorded, though the SSVC framework rates the technical impact as total should exploitation occur.
Cross-site request forgery in IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.8 enables remote attackers to execute unauthorized actions on behalf of authenticated users without their consent. The vulnerability exploits the server's implicit trust in session cookies, allowing a malicious third-party site to trigger state-changing requests against the Liberty instance. No public exploit code or active exploitation has been identified at time of analysis; IBM has released a patch.
Server-side request forgery in IBM WebSphere Application Server (traditional 9.0 and 8.5) and WebSphere Application Server Liberty (17.0.0.3 through 26.0.0.8) lets remote unauthenticated attackers coerce the server into issuing arbitrary requests when the SIP container feature (sipServlet-1.1) is enabled. The flaw carries a CVSS 9.8 rating with total technical impact, and IBM has released a fix (advisory node/7281721); no public exploit is identified at time of analysis and EPSS exploitation probability is low at 0.33%.
Remote code execution in IBM WebSphere Application Server Liberty (versions 17.0.0.3 through 26.0.0.8) allows unauthenticated network attackers to execute arbitrary code when the collectiveController-1.0 feature is enabled. Rooted in a missing-authentication weakness (CWE-306) on collective controller management functions, the flaw carries a 9.8 CVSS score and total technical impact per CISA's SSVC framework. There is no public exploit identified at time of analysis and EPSS is low (0.19%, 9th percentile), but the network-reachable, unauthenticated nature makes it a high-priority patch where the collective feature is in use.
Denial of service in IBM WebSphere Application Server 9.0, 8.5 and Liberty 17.0.0.3 through 26.0.0.7 allows unauthenticated remote attackers to consume server resources via malicious HTTP requests exploiting unbounded resource allocation. This can render the service unavailable. No active exploitation or public exploit has been identified.
Denial of service in IBM WebSphere Liberty 17.0.0.3 through 26.0.0.7 allows unauthenticated remote attackers to cause service disruption via uncontrolled heap allocation, resulting in high availability impact. No public exploit or active exploitation reported; vendor patch is available.
HTTP response smuggling in IBM WebSphere Application Server 9.0, 8.5, and Liberty versions 17.0.0.3 through 26.0.0.7 allows unauthenticated remote attackers to poison intermediate caching proxies by exploiting improper handling of non-standard HTTP version tokens. Successful exploitation leads to high confidentiality and integrity impact through cache poisoning, potentially enabling information disclosure and malicious content injection into proxied responses. A vendor patch is available, though no public exploit code or active exploitation has been reported at this time.
Information disclosure in IBM WebSphere Liberty ND Collective Controller, versions 17.0.0.3 through 26.0.0.8, allows remote unauthenticated attackers to read arbitrary files via path-segment injection in the collective routing mechanism. Successful exploitation exposes sensitive configuration data without user interaction or authentication. No public exploit or active exploitation (CISA KEV) has been reported at this time.
HTTP request smuggling in IBM WebSphere Application Server 8.5, 9.0, and Liberty 17.0.0.3 through 26.0.0.7 allows remote attackers to poison request queues, potentially leading to unauthorized information disclosure and cache poisoning. The flaw stems from improper handling of TRACE requests, with a CVSS base score of 8.7 but no evidence of active exploitation or public exploit code at the time of analysis.
HTTP request smuggling in IBM WebSphere Application Server (versions 8.5 and 9.0) and WebSphere Application Server Liberty (17.0.0.3 through 26.0.0.7) enables remote unauthenticated attackers to poison shared HTTP connections between a front-end proxy and the application server backend. The CVSS 8.1 score reflects full confidentiality, integrity, and availability impact (C:H/I:H/A:H) but is constrained by high attack complexity (AC:H), requiring a specific proxy-to-WAS pipeline configuration to exploit. No public exploit is identified at time of analysis; EPSS is very low at 0.21% (11th percentile) and SSVC confirms no known exploitation, though technical impact is rated total.
HTTP request smuggling in IBM WebSphere Application Server (traditional 8.5 and 9.0) and WebSphere Liberty (17.0.0.3 through 26.0.0.6) lets remote attackers desynchronize how front-end proxies and the WebSphere back-end parse HTTP request boundaries, enabling request-queue poisoning, security-control bypass, and disclosure of other users' data (tagged Information Disclosure). The CVSS 9.8 vector rates all impacts high, but SSVC records no observed exploitation and EPSS is low (0.34%); no public exploit is identified at time of analysis, and a vendor patch is available. Realistic exploitation depends on WebSphere sitting behind an intermediary that disagrees with it on request framing.
Denial of service in IBM WebSphere Application Server 9.0 and 8.5, and WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.6, allows remote unauthenticated attackers to exhaust server memory by sending specially-crafted requests. CVSS 7.5 (availability-only impact) with no public exploit identified at time of analysis and a low EPSS score of 0.31% (23rd percentile). IBM has released a patch via support advisory 7276579; CISA SSVC currently rates exploitation status as 'none'.
Denial of service in IBM WebSphere Application Server 8.5 and 9.0, plus WebSphere Liberty 17.0.0.3 through 26.0.0.6, allows remote unauthenticated attackers to exhaust server memory by sending a specially crafted request. The CVSS 7.5 score reflects high availability impact with no privileges or user interaction required, though no public exploit identified at time of analysis and no EPSS or KEV data is provided.
HTTP request smuggling in IBM WebSphere Application Server 8.5/9.0 and WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.6 allows unauthenticated remote attackers to bypass security controls, spoof identities, escalate privileges, and access sensitive information. IBM has released fixes and SSVC currently rates exploitation as 'none' with EPSS at 0.35% (27th percentile), but the CVSS 9.1 rating and total technical impact warrant prompt patching given the product's enterprise footprint. No public exploit identified at time of analysis.
Insecure deserialization in IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 enables a low-privileged administrative user to trigger unbounded resource consumption, resulting in denial of service against the application server. The attack requires the restConnector-2.0 administrative feature to be enabled and the attacker to have adjacent network access with valid low-privilege credentials. No public exploit code has been identified at time of analysis, and this CVE is not listed in the CISA Known Exploited Vulnerabilities catalog.
IBM WebSphere Application Server Liberty 23.0.0.9 through 23.0.0.10 could provide weaker than expected security due to improper resource expiration handling. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Authentication bypass in IBM WebSphere Application Server Liberty (versions 17.0.0.3 through 26.0.0.8) allows remote attackers to circumvent authentication controls when the rtcomm-1.0 or rtcommGateway-1.0 feature is enabled, exposing protected real-time communication functions. The CVSS 3.1 base score is 9.4 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:L), reflecting high confidentiality and integrity impact reachable over the network without credentials. A vendor patch is available; there is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV.
Privilege escalation in IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 allows an authenticated low-privileged user to gain unauthorized access to protected data and functionality when the Liberty collectives feature is in use. The CVSS vector (AV:N/AC:L/PR:L/UI:N) confirms network-exploitable, low-complexity exploitation requiring only low-level authentication with no user interaction - resulting in high confidentiality and integrity impact. No public exploit or CISA KEV listing has been identified at time of analysis; a vendor-released patch is available.
Unsafe class loading in the ORB (Object Request Broker) component of IBM WebSphere Application Server 8.5, 9.0, and Liberty Continuous Delivery allows a malicious or attacker-controlled IIOP server to force a WebSphere client/server to load and instantiate arbitrary Java classes over the network. Exploitation requires no authentication or user interaction (CVSS 9.8), and successful abuse can lead to loss of confidentiality, integrity, and availability, potentially culminating in remote code execution via dangerous class instantiation. There is no public exploit identified at time of analysis, and EPSS estimates only a 0.44% probability of exploitation in the next 30 days.
Denial of service in IBM WebSphere Application Server (9.0, 8.5) and WebSphere Application Server Liberty (17.0.0.3 through 26.0.0.7) lets remote unauthenticated attackers exhaust server resources by sending a single crafted HTTP request, forcing the application server to become unresponsive. The flaw (CWE-400, uncontrolled resource consumption) carries CVSS 7.5 with a full availability impact and requires no privileges or user interaction, making it trivially reachable on any exposed HTTP listener. There is no public exploit identified at time of analysis, but a vendor patch is available from IBM.
Security constraint bypass in IBM WebSphere Application Server 8.5/9.0 (Traditional) and WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.7 allows a remote, unauthenticated attacker to circumvent access controls and reach protected resources, resulting in disclosure of confidential information (CVSS 3.1 base 7.5, C:H). The flaw stems from an authentication-bypass-by-alternate-name weakness (CWE-289) in how the server evaluates security constraints. IBM has released a fix; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Uncontrolled memory consumption in IBM WebSphere Application Server Liberty (versions 17.0.0.3 through 26.0.0.7) lets a remote attacker crash or degrade the server by sending a single specially crafted request that forces excessive memory allocation. The flaw is network-reachable and requires no authentication or user interaction (PR:N/UI:N), and IBM (the reporter) has released a fix. There is no public exploit identified at time of analysis, and no EPSS or CISA KEV data was provided.
Cross-site request forgery in IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 enables server-side request forgery with elevated privileges when the collectiveController-1.0 feature is active. An attacker who lures an authenticated Liberty administrator to a malicious web page can trigger forged requests that the server executes with the victim's elevated privileges, allowing the attacker to reach internal services ordinarily inaccessible from the network perimeter. No public exploit code exists and no confirmed active exploitation is recorded, though the SSVC framework rates the technical impact as total should exploitation occur.
Cross-site request forgery in IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.8 enables remote attackers to execute unauthorized actions on behalf of authenticated users without their consent. The vulnerability exploits the server's implicit trust in session cookies, allowing a malicious third-party site to trigger state-changing requests against the Liberty instance. No public exploit code or active exploitation has been identified at time of analysis; IBM has released a patch.
Server-side request forgery in IBM WebSphere Application Server (traditional 9.0 and 8.5) and WebSphere Application Server Liberty (17.0.0.3 through 26.0.0.8) lets remote unauthenticated attackers coerce the server into issuing arbitrary requests when the SIP container feature (sipServlet-1.1) is enabled. The flaw carries a CVSS 9.8 rating with total technical impact, and IBM has released a fix (advisory node/7281721); no public exploit is identified at time of analysis and EPSS exploitation probability is low at 0.33%.
Remote code execution in IBM WebSphere Application Server Liberty (versions 17.0.0.3 through 26.0.0.8) allows unauthenticated network attackers to execute arbitrary code when the collectiveController-1.0 feature is enabled. Rooted in a missing-authentication weakness (CWE-306) on collective controller management functions, the flaw carries a 9.8 CVSS score and total technical impact per CISA's SSVC framework. There is no public exploit identified at time of analysis and EPSS is low (0.19%, 9th percentile), but the network-reachable, unauthenticated nature makes it a high-priority patch where the collective feature is in use.
Denial of service in IBM WebSphere Application Server 9.0, 8.5 and Liberty 17.0.0.3 through 26.0.0.7 allows unauthenticated remote attackers to consume server resources via malicious HTTP requests exploiting unbounded resource allocation. This can render the service unavailable. No active exploitation or public exploit has been identified.
Denial of service in IBM WebSphere Liberty 17.0.0.3 through 26.0.0.7 allows unauthenticated remote attackers to cause service disruption via uncontrolled heap allocation, resulting in high availability impact. No public exploit or active exploitation reported; vendor patch is available.
HTTP response smuggling in IBM WebSphere Application Server 9.0, 8.5, and Liberty versions 17.0.0.3 through 26.0.0.7 allows unauthenticated remote attackers to poison intermediate caching proxies by exploiting improper handling of non-standard HTTP version tokens. Successful exploitation leads to high confidentiality and integrity impact through cache poisoning, potentially enabling information disclosure and malicious content injection into proxied responses. A vendor patch is available, though no public exploit code or active exploitation has been reported at this time.
Information disclosure in IBM WebSphere Liberty ND Collective Controller, versions 17.0.0.3 through 26.0.0.8, allows remote unauthenticated attackers to read arbitrary files via path-segment injection in the collective routing mechanism. Successful exploitation exposes sensitive configuration data without user interaction or authentication. No public exploit or active exploitation (CISA KEV) has been reported at this time.
HTTP request smuggling in IBM WebSphere Application Server 8.5, 9.0, and Liberty 17.0.0.3 through 26.0.0.7 allows remote attackers to poison request queues, potentially leading to unauthorized information disclosure and cache poisoning. The flaw stems from improper handling of TRACE requests, with a CVSS base score of 8.7 but no evidence of active exploitation or public exploit code at the time of analysis.
HTTP request smuggling in IBM WebSphere Application Server (versions 8.5 and 9.0) and WebSphere Application Server Liberty (17.0.0.3 through 26.0.0.7) enables remote unauthenticated attackers to poison shared HTTP connections between a front-end proxy and the application server backend. The CVSS 8.1 score reflects full confidentiality, integrity, and availability impact (C:H/I:H/A:H) but is constrained by high attack complexity (AC:H), requiring a specific proxy-to-WAS pipeline configuration to exploit. No public exploit is identified at time of analysis; EPSS is very low at 0.21% (11th percentile) and SSVC confirms no known exploitation, though technical impact is rated total.
HTTP request smuggling in IBM WebSphere Application Server (traditional 8.5 and 9.0) and WebSphere Liberty (17.0.0.3 through 26.0.0.6) lets remote attackers desynchronize how front-end proxies and the WebSphere back-end parse HTTP request boundaries, enabling request-queue poisoning, security-control bypass, and disclosure of other users' data (tagged Information Disclosure). The CVSS 9.8 vector rates all impacts high, but SSVC records no observed exploitation and EPSS is low (0.34%); no public exploit is identified at time of analysis, and a vendor patch is available. Realistic exploitation depends on WebSphere sitting behind an intermediary that disagrees with it on request framing.
Denial of service in IBM WebSphere Application Server 9.0 and 8.5, and WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.6, allows remote unauthenticated attackers to exhaust server memory by sending specially-crafted requests. CVSS 7.5 (availability-only impact) with no public exploit identified at time of analysis and a low EPSS score of 0.31% (23rd percentile). IBM has released a patch via support advisory 7276579; CISA SSVC currently rates exploitation status as 'none'.
Denial of service in IBM WebSphere Application Server 8.5 and 9.0, plus WebSphere Liberty 17.0.0.3 through 26.0.0.6, allows remote unauthenticated attackers to exhaust server memory by sending a specially crafted request. The CVSS 7.5 score reflects high availability impact with no privileges or user interaction required, though no public exploit identified at time of analysis and no EPSS or KEV data is provided.
HTTP request smuggling in IBM WebSphere Application Server 8.5/9.0 and WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.6 allows unauthenticated remote attackers to bypass security controls, spoof identities, escalate privileges, and access sensitive information. IBM has released fixes and SSVC currently rates exploitation as 'none' with EPSS at 0.35% (27th percentile), but the CVSS 9.1 rating and total technical impact warrant prompt patching given the product's enterprise footprint. No public exploit identified at time of analysis.
Insecure deserialization in IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 enables a low-privileged administrative user to trigger unbounded resource consumption, resulting in denial of service against the application server. The attack requires the restConnector-2.0 administrative feature to be enabled and the attacker to have adjacent network access with valid low-privilege credentials. No public exploit code has been identified at time of analysis, and this CVE is not listed in the CISA Known Exploited Vulnerabilities catalog.
IBM WebSphere Application Server Liberty 23.0.0.9 through 23.0.0.10 could provide weaker than expected security due to improper resource expiration handling. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.