CVE-2026-57915— Apache Kerby: Kerberos Pre-Authentication Bypass
Quick assessment
Affected
Apache Software Foundation Apache Kerby
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Apache Kerby是美国Apache基金会的一款Kerberos认证协议实现框架。 Apache Kerby 2.1.2之前版本存在授权问题漏洞，该漏洞源于发送未识别或不受支持的PA-DATA类型可绕过Kerberos预身份验证检查。
Possible ATT&CK Techniques 1 AI
T1556.003 · Pluggable Authentication ModulesAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Kerby | < 2.1.2 |
affected |
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I. Basic Information for CVE-2026-57915
Vulnerability Information
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Vulnerability Title
Apache Kerby: Kerberos Pre-Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证中关键步骤缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Kerby 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Kerby是美国Apache基金会的一款Kerberos认证协议实现框架。 Apache Kerby 2.1.2之前版本存在授权问题漏洞，该漏洞源于发送未识别或不受支持的PA-DATA类型可绕过Kerberos预身份验证检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Kerby | 0 ~ 2.1.2 | - |
|
II. Public POCs for CVE-2026-57915
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-57915 (1)
Same Patch Batch · Apache Software Foundation · 2026-06-26 · 5 CVEs total
| CVE-2026-49486 | Apache Airflow FTP provider: FTP Provider does not protect FTPS data channel (missing PROT | |
| CVE-2026-57914 | Apache Kerby: StackOverflow on parsing deeply nested ASN1 structures | |
| CVE-2025-55017 | Apache IoTDB: Path Traversal Vulnerability | |
| CVE-2025-64152 | Apache IoTDB: Path Traversal Vulnerability |
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V. Comments for CVE-2026-57915
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