Apache Kerby: Kerberos Pre-Authentication Bypass
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.3epss 0.5%
exploitation probability
0.5%top 57% of all CVEs
observed exploitation
nono source reports it
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 KerbyReferences
https://access.redhat.com/security/cve/CVE-2026-57915https://bugzilla.redhat.com/show_bug.cgi?id=2493407https://lists.apache.org/thread/1y3glgh3kzwoxo5m2lq504cjlh1dsrfhhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57915.jsonhttp://www.openwall.com/lists/oss-security/2026/06/26/8