CVE-2026-57915
Apache Kerby: Kerberos Pre-Authentication Bypass
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Apache Kerby: Kerberos Pre-Authentication Bypass
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.
- Record
CVE-2026-57915- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-304, CWE-358
- Updated
- 2026-11-02
EUVDEUVD-2026-39650
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.
- Record
EUVD-2026-39650- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-262p-fj3f-xh7v
Apache Kerby has a bypass the Kerberos pre-authentication check
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.
- Record
GHSA-262p-fj3f-xh7v- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-304, CWE-358
- Updated
- 2026-11-03
NVD
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.
- Record
CVE-2026-57915- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-304, CWE-358
- Updated
- 2026-11-02
OSVGHSA-262p-fj3f-xh7v
Apache Kerby has a bypass the Kerberos pre-authentication check
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.
- Record
GHSA-262p-fj3f-xh7v- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-304, CWE-358
- Updated
- 2026-11-03
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.kerby:kerb-serverMaven |
before 2.1.2 | 2.1.2 |
org.apache.kerby:kerb-serverMaven |
before 2.1.2, plus listed versions 1.0.01.0.0-RC11.0.0-RC21.0.11.1.0 Show 7 moreShow less1.1.12.0.02.0.12.0.22.0.32.1.02.1.1 |
2.1.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts, references | GitHub Advisories, OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-57915 is a high vulnerability (CVSS 7.3) in Apache Software Foundation Kerby, published June 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. Fixed in org.apache.kerby:kerb-server 2.1.2.