CVE-2026-57915

Apache Kerby: Kerberos Pre-Authentication Bypass

CVSS 7.3 HIGHEPSS 0.3%CWE-304 CWE-358

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

26 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

It is possible to bypass the Kerberos pre-authentication check in Apache Kerby by sending a PA-DATA with an unrecognized or unsupported type. Users are recommended to upgrade to version 2.1.2, which fixes this issue.

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

Affected products

Apache Software Foundation · Apache Kerby

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References

https://access.redhat.com/security/cve/CVE-2026-57915 https://bugzilla.redhat.com/show_bug.cgi?id=2493407 https://lists.apache.org/thread/1y3glgh3kzwoxo5m2lq504cjlh1dsrfh https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57915.json http://www.openwall.com/lists/oss-security/2026/06/26/8