---
cve: "CVE-2026-40596"
severity: "HIGH"
cvss: 7.2
epss: "42%"
vendor: "mantisbt"
kev: false
exploited: false
published: "2026-05-22 20:16:34"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T04:26:02+02:00"
---

# CVE-2026-40596

> 7.2 HIGH · 🧪 PoC

## Beschreibung

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.11.0 through 2.28.1 allow any authenticated user to inject arbitrary HTML by updating their account's font family. Upon exploitation, an XSS payload would be reflected on every MantisBT page. Leveraging another vulnerability (CSP bypass, see GHSA-9c3j-xm6v-j7j3), the attacker could achieve account takeover. This issue has been fixed in version 2.28.2.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |

## Patch verfügbar (OSV)

- 399605af5f5c7640a2cf6b551409d9e37c5b4b7b (Commit)

## Referenzen

- <https://github.com/mantisbt/mantisbt/security/advisories/GHSA-j3v9-553h-x28j>
- <https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3>
- <https://github.com/mantisbt/mantisbt/commit/9e8409cdd979eba86ef532756fc47c1d8112d22d>
- <https://mantisbt.org/bugs/view.php?id=37011>
- <https://mantisbt.org/bugs/view.php?id=37016>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40596) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_