| Name | CVE-2026-41839 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libspring-java (PTS) | bullseye | 4.3.30-1 | vulnerable |
| bookworm | 4.3.30-2 | vulnerable |
| trixie | 4.3.30-3 | vulnerable |
| forky, sid | 4.3.30-4 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libspring-java | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://spring.io/security/cve-2026-41839
Only supported for building applications shipped in Debian, see README.Debian.security