---
cve: "CVE-2026-55957"
severity: "HIGH"
cvss: 7.3
epss: "2.9%"
vendor: "Apache Software Foundation"
kev: false
exploited: false
published: "2026-06-29 21:16:45"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T08:42:23+02:00"
---

# CVE-2026-55957

> 7.3 HIGH

## Beschreibung

Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.

## CVSS-Vektor

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

| 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 | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- cf9caee37dd3d2dbb0294983e921c12a318c1f5e (Commit)
- e4338ee7a3e0f22d85f7cb2e04dacee752eaa619 (Commit)

## Referenzen

- <https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh>
- <http://www.openwall.com/lists/oss-security/2026/06/29/26>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55957) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_