Critical Buffer Overflow Vulnerability in MUNGE Authentication Service
Summary
RLSA-2026:3032: Important: munge security update. Affects munge versions < 0:0.5.13-3.el8_10. Fixed in 0:0.5.13-3.el8_10. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
MUNGE (MUNGE Uid 'N' Gid Emporium) is an authentication service designed for creating and validating credentials in high-performance computing (HPC) cluster environments. It allows processes to authenticate user IDs (UIDs) and group IDs (GIDs) of local or remote processes within a defined security realm, which is established through a shared cryptographic key. MUNGE is known for its scalability and efficiency, making it a popular choice for managing authentication in environments with common users and groups across multiple hosts.
Vulnerability Detail
The vulnerability identified as CVE-2026-25506 is a critical buffer overflow in the message unpacking process of MUNGE. This flaw can lead to key leakage and credential forgery, allowing unauthorized access to sensitive resources. The vulnerability arises from improper handling of input data, which can be exploited by an attacker to manipulate memory and execute arbitrary code. The potential ramifications include unauthorized authentication, data breaches, and compromise of the entire security realm, making it imperative for users to address this issue promptly.
How To Fix
Minimum fixed version
0:0.5.13-3.el8_10
This is the first release that contains the fix.
sudo dnf update mungeTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the MUNGE service by implementing stricter firewall rules or by isolating the affected systems from untrusted networks until the patch is applied.
Conclusion
The MUNGE authentication service has a critical vulnerability that can lead to severe security risks, including credential forgery and unauthorized access. It is essential for users to update to the patched version to mitigate these risks. Additionally, utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
See every vulnerability recorded for munge →
FAQ
The CVSS score of this vulnerability is 7.7, indicating a high level of severity.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The consequences include unauthorized access to resources, data breaches, and potential compromise of the entire security realm.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
If immediate updates are not possible, implement stricter access controls and isolate affected systems from untrusted networks as a temporary measure.
Related vulnerabilities
Recent vulnerabilities recorded for munge.
