MEDIUMCVSS 4.2EPSS 0.2%

CVE-2026-41839

CVE-2026-41839 updated by NVD

Published: 2026-06-09
Modified: 2026-07-30
EPSS percentile: 10%
Sources: github-advisory, nvd

Summary

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.

Affected packages

Ecosystem	Package	Affected versions	Fixed versions
Maven	org.springframework:spring-webflux	—	7.0.8, 6.2.19

Remediation: Upgrade to 7.0.8 or later.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-41839

Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.