CVE-2026-57915 Apache Kerby: Kerberos Pre-Authentication Bypass
Attackers can bypass Kerberos pre-authentication by sending unsupported PA-DATA types, allowing unauthorized access to systems using Apache Kerby.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57915?
CVE-2026-57915 is a high-severity authentication bypass vulnerability in Apache Kerby, published on 26 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-57915?
How do I fix CVE-2026-57915?
No fix has been published for CVE-2026-57915 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-57915 being exploited?
There is no known exploitation of CVE-2026-57915 in the wild and no public exploit code.
Sources
Also known as GHSA-262p-fj3f-xh7v.