spring-projects/spring-framework · Security
Spring Framework Escalation via Session Fixation in WebFlux
- GHSA ID
- GHSA-4hfh-6x8g-gwpp
- CVE ID
- CVE-2026-41839
- Severity
- medium
- Published
- Updated
- CVSS
- 4.2 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- CVSS v3
- 4.2 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Description
A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.
Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
CWEs
- CWE-384 · Session Fixation
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-41839 ↗
- https://spring.io/security/cve-2026-41839 ↗
- https://github.com/spring-projects/spring-framework/issues/36742 ↗
- https://github.com/spring-projects/spring-framework/issues/36743 ↗
- https://github.com/spring-projects/spring-framework/commit/b8ddd2c690fe3f00bb5e3d9f913a37504aab49a0 ↗
- https://github.com/spring-projects/spring-framework/commit/d72da90d3a562632e2b565113813f7b4a31f8717 ↗
- https://github.com/spring-projects/spring-framework/releases/tag/v6.2.19 ↗
- https://github.com/spring-projects/spring-framework/releases/tag/v7.0.8 ↗
- https://github.com/advisories/GHSA-4hfh-6x8g-gwpp ↗