🛡️ CVE-2026-55957 — tomcat

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-304 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

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 through 11.0.4, from 10.1.0 through 10.1.36, from 9.0.0 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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Affected software

CVE-2026-55957 is recorded against 1 package.

  • tomcat

Timeline and source

Published on 6 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.openwall.com (Web)
lists.apache.org (Web)
nvd.nist.gov (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE CWE-304
Public Exploit ✅ No
Source OSV
Published 2026-07-06
Updated 2026-08-12
Modified 2026-07-06
Fix URL N/A

Affected Packages

Software From version Fixed in
tomcat — —

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