CVE-2026-40607: MantisBT is Vulnerable to Stored XSS in Saved-Filter Owner Column

May 11, 2026 (updated June 8, 2026)

Incorrect escaping of a saved filter’s owner allows an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON.

References

github.com/advisories/GHSA-f633-865q-2mhh
github.com/mantisbt/mantisbt/commit/44f490bcf20fd491c1b8f3fc9dd041d8c2a30010
github.com/mantisbt/mantisbt/security/advisories/GHSA-f633-865q-2mhh
mantisbt.org/bugs/view.php?id=37015
nvd.nist.gov/vuln/detail/CVE-2026-40607

Code Behaviors & Features

Detect and mitigate CVE-2026-40607 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →