9 New Java Vulnerabilities - 1 Critical, 8 High Severity

Predictable WebSocket session IDs in Spring Framework's spring-websocket module allow remote attackers to guess or forge session identifiers and, when paired with weak authorization rules, hijack or interact with other users' WebSocket sessions. The flaw affects Spring Framework 5.3.x, 6.1.x, 6.2.x, and 7.0.x prior to patched releases; no public exploit identified at time of analysis and EPSS is very low (0.03%).

Denial of service in Spring Framework's AntPathMatcher allows remote unauthenticated attackers to exhaust CPU resources via Regular Expression Denial of Service (ReDoS) when attacker-controlled patterns are passed to match(), matchStart(), or extractUriTemplateVariables(). Affects Spring Framework 5.3.0-5.3.48, 6.1.0-6.1.27, 6.2.0-6.2.18, and 7.0.0-7.0.7. No public exploit identified at time of analysis, EPSS is very low (0.01%, 2nd percentile), and SSVC indicates no observed exploitation.

Denial of service in VMware's Spring Framework (versions 5.3.0-5.3.48, 6.1.0-6.1.27, 6.2.0-6.2.18, and 7.0.0-7.0.7) lets remote attackers exhaust memory in applications that evaluate user-supplied Spring Expression Language (SpEL) expressions, where crafted expressions trigger unbounded internal cache growth. No authentication or user interaction is required per the CVSS vector (PR:N/UI:N), and the impact is availability-only (C:N/I:N/A:H). There is no public exploit identified at time of analysis, and the EPSS probability is very low (0.01%, 2nd percentile), though CISA's SSVC framework flags the issue as automatable.

Server-side request forgery (SSRF) in Spring Framework's UriComponentsBuilder affects applications that use this API to parse and validate externally supplied URL strings. Incorrect host parsing allows a remote, unauthenticated attacker - with user interaction - to cause the application server to issue requests to unintended internal or external destinations, exposing low-level confidentiality and integrity impacts. No public exploit identified at time of analysis and no CISA KEV listing; however, SSRF in widely deployed Java frameworks warrants attention in any internet-facing application that processes user-controlled URLs.

Cross-site scripting (XSS) in Spring Framework's MVC JSP form tags allows unauthenticated remote attackers to inject arbitrary HTML or JavaScript into rendered pages by supplying malicious values through the cssClass, cssErrorClass, or cssStyle tag attributes. Applications across four active Spring Framework release lines (5.3.x through 7.0.x) are affected when they pass user-controlled input directly into these tag attributes. No public exploit code has been identified at time of analysis, and CISA has not listed this CVE in the Known Exploited Vulnerabilities catalog, but the broad installed base of Spring MVC in enterprise Java environments and the high confidentiality impact (session hijacking, credential theft) warrant prompt patching.

Reflected cross-site scripting in SAP NetWeaver JAVA's JDBC Test Servlet enables unauthenticated remote attackers to craft malicious URLs that execute arbitrary JavaScript in a victim's browser upon interaction. The Changed Scope (S:C) in the CVSS vector indicates the injected script can affect browser context beyond the vulnerable origin, enabling session theft, credential harvesting, or unauthorized modification of webclient data. No public exploit code has been identified at time of analysis, and this vulnerability has not been listed in the CISA KEV catalog.

Open redirect in Spring Framework (Spring MVC and Spring WebFlux) across four major version branches enables unauthenticated remote attackers to craft URLs that cause the application to issue a 302 HTTP redirect to an arbitrary attacker-controlled external host. The vulnerability is conditionally exploitable - requiring a catch-all wildcard route mapping without an explicit view name - and demands user interaction to trigger. CVSS rates this 4.2 Medium (AV:N/AC:H/PR:N/UI:R); no public exploit code or CISA KEV listing has been identified at time of analysis.

Information disclosure in Spring Framework's static resource resolution affects Spring MVC and WebFlux applications across four active release lines (5.3.x, 6.1.x, 6.2.x, and 7.0.x). Unauthenticated remote attackers exploiting this flaw can access sensitive cached content served through the static resource handling pipeline, achieving high confidentiality impact. No public exploit code or CISA KEV listing has been identified at time of analysis, and the AC:H vector indicates exploitation requires specific conditions beyond default network access.