---
cve: "CVE-2026-43515"
severity: "CRITICAL"
cvss: 9.1
epss: "1.1%"
vendor: "Apache Software Foundation"
kev: false
exploited: false
published: "2026-05-12 16:16:18"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T19:13:26+02:00"
---

# CVE-2026-43515

> 9.1 CRITICAL

## Beschreibung

Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- b4aab5184c1cf1acc0e845e0fd7306dee578e16b (Commit)
- c70966726754f8b3ab63b5ac846a7e7cf6eb255a (Commit)

## Referenzen

- <https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bb>
- <http://www.openwall.com/lists/oss-security/2026/05/12/11>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-43515) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_