GitHub Advisoryadvisory · Maven

GHSA-4hfh-6x8g-gwpp Spring Framework Escalation via Session Fixation in WebFlux

MEDIUM Published 2026-06-09 Modified 2026-07-30 Official page ↗
Aliases
CVE-2026-41839
Ecosystem
Maven
Packages
org.springframework:spring-webflux
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Weaknesses
CWE-384
Reviewed
2026-07-30

Affected packages

• Maven org.springframework:spring-webflux: >= 7.0.0, < 7.0.8 → fixed in 7.0.8 • Maven org.springframework:spring-webflux: >= 6.2.0, < 6.2.19 → fixed in 6.2.19 • Maven org.springframework:spring-webflux: >= 6.1.0, <= 6.1.21 (no fix yet) • Maven org.springframework:spring-webflux: <= 5.3.39 (no fix yet)

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.

Related

Alias · CVE (1)

  • CVE-2026-41839 A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation… vulnerability

Weakness · CWE (1)

  • CWE-384 Session Fixation weakness

References