Medium 6.9Published May 22, 2026

CVE-2026-40598MantisBT has Potential Referer-Based Reflected HTML Injection / XSS in Tag Update Page

Updated under an hour ago (Oct 27, 2026, 12:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for mantisbt

Exploited in the last 30 days

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, improper escaping of the redirection page (retrieved from the request's Referer header) allows an attacker to inject HTML. While this is generally not directly actionable as modern browsers will URL-encode special characters, on some specific server configurations this could poison the cache, leading to cross-site scripting. This issue has been fixed in version 2.28.2.

CVSS: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: May 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

mantisbt mantisbt mantisbt:mantisbt (from the name)	before 2.28.2	CNA record

References

References

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-6jh4-47v2-4g37	x-refsource-confirm
https://github.com/mantisbt/mantisbt/commit/b1ebc57763f104eb5f541b7b4d1ce6948168abd9	x-refsource-misc
https://mantisbt.org/bugs/view.php?id=37017	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.