Vulnerability Description
Mojolicious is a real-time web framework for Perl. Prior to 9.48, the Mojolicious CSRF helpers csrf_field, csrf_token, and csrf_protect reuse an unchanged per-session token in rendered HTML. When response compression is enabled and attacker-influenced content is reflected in the same response, an unauthenticated attacker who can induce many victim requests and observe response sizes can use a BREACH compression side channel to recover the token and forge cross-site requests. API-only deployments that never render the token in HTML are not affected. This issue is fixed in version 9.48.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24
- https://github.com/mojolicious/mojo/security/advisories/GHSA-cf46-h6jw-mj3r
FAQ
What is CVE-2026-77568?
CVE-2026-77568 is a vulnerability with a CVSS score of 4.2 (MEDIUM). Mojolicious is a real-time web framework for Perl. Prior to 9.48, the Mojolicious CSRF helpers csrf_field, csrf_token, and csrf_protect reuse an unchanged per-session token in rendered HTML. When resp...
How severe is CVE-2026-77568?
CVE-2026-77568 has been rated MEDIUM with a CVSS base score of 4.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-77568?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.