---
id: CVE-2026-57915
aliases:
  - GHSA-262p-fj3f-xh7v
title: Apache Kerby has a bypass the Kerberos pre-authentication check
summary: Apache Kerby has a bypass the Kerberos pre-authentication check
severity: high
cvss: 7.3
cwe:
  - CWE-304
  - CWE-358
vendor: apache
product: 'org.apache.kerby:kerb-server'
ecosystem: maven
affected:
  - 'org.apache.kerby:kerb-server < 2.1.2'
patched:
  - 'org.apache.kerby:kerb-server 2.1.2'
published: '2026-06-26'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T22:01:13Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-262p-fj3f-xh7v'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57915'
  - url: 'https://lists.apache.org/thread/1y3glgh3kzwoxo5m2lq504cjlh1dsrfh'
  - url: 'http://www.openwall.com/lists/oss-security/2026/06/26/8'
  - url: 'https://access.redhat.com/security/cve/CVE-2026-57915'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2493407'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57915.json
  - url: >-
      https://github.com/apache/directory-kerby/commit/995fa59fac53f8e2e6fb987e0e29a5ae3a4bbf38
  - url: 'https://github.com/apache/directory-kerby/releases/tag/kerby-all-2.1.2'
  - url: 'https://github.com/advisories/GHSA-262p-fj3f-xh7v'
tags:
  - ghsa
  - maven
epss: 0.00526
epssPercentile: 0.44672
ingestedAt: '2026-11-03T22:57:11.289Z'
---

## Overview

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.

## Affected packages

- `org.apache.kerby:kerb-server < 2.1.2`

## Remediation

Upgrade to a patched release:

- `org.apache.kerby:kerb-server 2.1.2`