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Ktor

20 CVEs product

Monthly

CVE-2025-29904 MEDIUM This Month

In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Request Smuggling Ktor
NVD
CVSS 3.1
5.3
EPSS
0.0%
CVE-2024-49580 Maven MEDIUM PATCH This Month

In JetBrains Ktor before 2.3.13 improper caching in HttpCache Plugin could lead to response information disclosure. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
CVSS 3.1
5.3
EPSS
0.3%
CVE-2023-45613 CRITICAL PATCH Act Now

In JetBrains Ktor before 2.3.5 server certificates were not verified. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Information Disclosure Ktor
NVD
CVSS 3.1
9.1
EPSS
0.3%
CVE-2023-45612 CRITICAL PATCH Act Now

In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.

XXE Ktor
NVD
CVSS 3.1
9.8
EPSS
0.6%
CVE-2023-34339 LOW PATCH Monitor

In JetBrains Ktor before 2.3.1 headers containing authentication data could be added to the exception's message. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity.

Information Disclosure Ktor
NVD
CVSS 3.1
3.3
EPSS
0.2%
CVE-2022-38180 Maven MEDIUM PATCH This Month

In JetBrains Ktor before 2.1.0 the wrong authentication provider could be selected in some cases. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Ktor
NVD GitHub
CVSS 3.1
6.5
EPSS
0.6%
CVE-2022-38179 Maven MEDIUM PATCH This Month

JetBrains Ktor before 2.1.0 was vulnerable to the Reflect File Download attack. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD GitHub
CVSS 3.1
6.1
EPSS
0.4%
CVE-2022-29930 MEDIUM PATCH This Month

SHA1 implementation in JetBrains Ktor Native 2.0.0 was returning the same value. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable, low attack complexity.

Information Disclosure Ktor
NVD GitHub
CVSS 3.1
4.9
EPSS
0.8%
CVE-2022-29035 LOW PATCH Monitor

In JetBrains Ktor Native before version 2.0.0 random values used for nonce generation weren't using SecureRandom implementations. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity.

Information Disclosure Ktor
NVD GitHub
CVSS 3.1
2.7
EPSS
0.6%
CVE-2021-43203 HIGH This Week

In JetBrains Ktor before 1.6.4, nonce verification during the OAuth2 authentication process is implemented improperly. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Ktor
NVD
CVSS 3.1
7.5
EPSS
0.8%
CVE-2021-25763 MEDIUM This Month

In JetBrains Ktor before 1.4.2, weak cipher suites were enabled by default. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
CVSS 3.1
5.3
EPSS
0.5%
CVE-2021-25762 MEDIUM This Month

In JetBrains Ktor before 1.4.3, HTTP Request Smuggling was possible. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Request Smuggling Information Disclosure Ktor
NVD
CVSS 3.1
5.3
EPSS
0.8%
CVE-2021-25761 MEDIUM This Month

In JetBrains Ktor before 1.5.0, a birthday attack on SessionStorage key was possible. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
CVSS 3.1
5.3
EPSS
0.5%
CVE-2020-26129 MEDIUM This Month

In JetBrains Ktor before 1.4.1, HTTP request smuggling was possible. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Request Smuggling Information Disclosure Ktor
NVD
CVSS 3.1
6.5
EPSS
0.8%
CVE-2020-5207 Maven HIGH PATCH This Week

In Ktor before 1.3.0, request smuggling is possible when running behind a proxy that doesn't handle Content-Length and Transfer-Encoding properly or doesn't handle \n as a headers separator. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This HTTP Request/Response Smuggling vulnerability could allow attackers to manipulate HTTP request interpretation between frontend and backend servers.

Request Smuggling Information Disclosure Ktor
NVD GitHub
CVSS 3.1
7.5
EPSS
0.8%
CVE-2019-19389 MEDIUM POC PATCH This Month

JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Information Disclosure Ktor
NVD GitHub
CVSS 3.1
5.4
EPSS
0.8%
CVE-2019-19703 Maven MEDIUM POC PATCH This Month

In Ktor through 1.2.6, the client resends data from the HTTP Authorization header to a redirect location. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Open Redirect Ktor
NVD GitHub
CVSS 3.1
6.1
EPSS
0.6%
CVE-2019-12737 MEDIUM This Month

UserHashedTableAuth in JetBrains Ktor framework before 1.2.0-rc uses a One-Way Hash with a Predictable Salt for storing user credentials. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
CVSS 3.1
5.3
EPSS
0.7%
CVE-2019-12736 CRITICAL Act Now

JetBrains Ktor framework before 1.2.0-rc does not sanitize the username provided by the user for the LDAP protocol, leading to command injection. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Command Injection Ktor
NVD
CVSS 3.1
9.8
EPSS
2.2%
CVE-2019-10102 HIGH This Week

JetBrains Ktor framework (created using the Kotlin IDE template) versions before 1.1.0 were resolving artifacts using an http connection during the build process, potentially allowing an MITM attack. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Information Disclosure Kotlin Ktor
NVD
CVSS 3.0
8.1
EPSS
0.9%
EPSS 0% CVSS 5.3
MEDIUM This Month

In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Request Smuggling Ktor
NVD
EPSS 0% CVSS 5.3
MEDIUM PATCH This Month

In JetBrains Ktor before 2.3.13 improper caching in HttpCache Plugin could lead to response information disclosure. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
EPSS 0% CVSS 9.1
CRITICAL PATCH Act Now

In JetBrains Ktor before 2.3.5 server certificates were not verified. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Information Disclosure Ktor
NVD
EPSS 1% CVSS 9.8
CRITICAL PATCH Act Now

In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.

XXE Ktor
NVD
EPSS 0% CVSS 3.3
LOW PATCH Monitor

In JetBrains Ktor before 2.3.1 headers containing authentication data could be added to the exception's message. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity.

Information Disclosure Ktor
NVD
EPSS 1% CVSS 6.5
MEDIUM PATCH This Month

In JetBrains Ktor before 2.1.0 the wrong authentication provider could be selected in some cases. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Ktor
NVD GitHub
EPSS 0% CVSS 6.1
MEDIUM PATCH This Month

JetBrains Ktor before 2.1.0 was vulnerable to the Reflect File Download attack. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD GitHub
EPSS 1% CVSS 4.9
MEDIUM PATCH This Month

SHA1 implementation in JetBrains Ktor Native 2.0.0 was returning the same value. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable, low attack complexity.

Information Disclosure Ktor
NVD GitHub
EPSS 1% CVSS 2.7
LOW PATCH Monitor

In JetBrains Ktor Native before version 2.0.0 random values used for nonce generation weren't using SecureRandom implementations. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity.

Information Disclosure Ktor
NVD GitHub
EPSS 1% CVSS 7.5
HIGH This Week

In JetBrains Ktor before 1.6.4, nonce verification during the OAuth2 authentication process is implemented improperly. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Ktor
NVD
EPSS 1% CVSS 5.3
MEDIUM This Month

In JetBrains Ktor before 1.4.2, weak cipher suites were enabled by default. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
EPSS 1% CVSS 5.3
MEDIUM This Month

In JetBrains Ktor before 1.4.3, HTTP Request Smuggling was possible. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Request Smuggling Information Disclosure Ktor
NVD
EPSS 1% CVSS 5.3
MEDIUM This Month

In JetBrains Ktor before 1.5.0, a birthday attack on SessionStorage key was possible. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
EPSS 1% CVSS 6.5
MEDIUM This Month

In JetBrains Ktor before 1.4.1, HTTP request smuggling was possible. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Request Smuggling Information Disclosure Ktor
NVD
EPSS 1% CVSS 7.5
HIGH PATCH This Week

In Ktor before 1.3.0, request smuggling is possible when running behind a proxy that doesn't handle Content-Length and Transfer-Encoding properly or doesn't handle \n as a headers separator. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This HTTP Request/Response Smuggling vulnerability could allow attackers to manipulate HTTP request interpretation between frontend and backend servers.

Request Smuggling Information Disclosure Ktor
NVD GitHub
EPSS 1% CVSS 5.4
MEDIUM POC PATCH This Month

JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Information Disclosure Ktor
NVD GitHub
EPSS 1% CVSS 6.1
MEDIUM POC PATCH This Month

In Ktor through 1.2.6, the client resends data from the HTTP Authorization header to a redirect location. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Open Redirect Ktor
NVD GitHub
EPSS 1% CVSS 5.3
MEDIUM This Month

UserHashedTableAuth in JetBrains Ktor framework before 1.2.0-rc uses a One-Way Hash with a Predictable Salt for storing user credentials. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Ktor
NVD
EPSS 2% CVSS 9.8
CRITICAL Act Now

JetBrains Ktor framework before 1.2.0-rc does not sanitize the username provided by the user for the LDAP protocol, leading to command injection. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Command Injection Ktor
NVD
EPSS 1% CVSS 8.1
HIGH This Week

JetBrains Ktor framework (created using the Kotlin IDE template) versions before 1.1.0 were resolving artifacts using an http connection during the build process, potentially allowing an MITM attack. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Information Disclosure Kotlin Ktor
NVD

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