GHSA-4hfh-6x8g-gwpp
Spring Framework Escalation via Session Fixation in WebFlux
Quick fix
GHSA-4hfh-6x8g-gwpp — org.springframework:spring-webflux: upgrade to the fixed version with the command below.
# pom.xml: bump <version>7.0.8</version> for org.springframework:spring-webfluxDetails
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
7.0.0 Fixed in: 7.0.8 # pom.xml: bump <version>7.0.8</version> for org.springframework:spring-webflux 6.2.0 Fixed in: 6.2.19 # pom.xml: bump <version>6.2.19</version> for org.springframework:spring-webflux 6.1.0 No fixed version published yet for org.springframework:spring-webflux (maven). Pin to a known-safe version or switch to an alternative.
0 No fixed version published yet for org.springframework:spring-webflux (maven). Pin to a known-safe version or switch to an alternative.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-41839 [ADVISORY]
- https://github.com/spring-projects/spring-framework/issues/36742 [WEB]
- https://github.com/spring-projects/spring-framework/issues/36743 [WEB]
- https://github.com/spring-projects/spring-framework/commit/b8ddd2c690fe3f00bb5e3d9f913a37504aab49a0 [WEB]
- https://github.com/spring-projects/spring-framework/commit/d72da90d3a562632e2b565113813f7b4a31f8717 [WEB]
- https://github.com/spring-projects/spring-framework [PACKAGE]
- https://github.com/spring-projects/spring-framework/releases/tag/v6.2.19 [WEB]
- https://github.com/spring-projects/spring-framework/releases/tag/v7.0.8 [WEB]
- https://spring.io/security/cve-2026-41839 [WEB]