Improper Authentication in Apache Kerby - CVE-2026-57915

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Main Vulnerability Database Vulnerabilities #VU144683

Improper Authentication in Apache Kerby - CVE-2026-57915

Published: August 24, 2026


Vulnerability identifier: #VU144683
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57915
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass kerberos pre-authentication.

The vulnerability exists due to improper authentication in kerb-server when processing PA-DATA with an unrecognized or unsupported type. A remote attacker can send a specially crafted PA-DATA value to bypass kerberos pre-authentication.


Affected software

Apache Kerby
IBM InfoSphere Information Server

How to mitigate CVE-2026-57915

Install security update from vendor's website.

Apache Kerby - update to 2.1.2
IBM InfoSphere Information Server - update to 11.7.1.6 Service pack 3

External References

Related Security Bulletins