CVE-2026-57915
Description
A flaw was found in Apache Kerby. An attacker can bypass the Kerberos pre-authentication check by sending a Pre-Authentication Data (PA-DATA) packet with an unrecognized or unsupported type. This vulnerability allows an attacker to circumvent the initial authentication step, potentially leading to unauthorized access or impersonation within a Kerberos-protected environment.
Statement
This is an Important flaw in Apache Kerby, affecting Red Hat products that utilize Kerberos for authentication, including Red Hat AMQ, JBoss Data Grid, Enterprise Application Platform, and Red Hat JBoss Fuse. The vulnerability allows an attacker to bypass the Kerberos pre-authentication check by sending a specially crafted Pre-Authentication Data (PA-DATA) packet. This circumvents an initial authentication step, potentially leading to unauthorized access or impersonation within a Kerberos-protected environment.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.3 | N/A | 7.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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