CVE-2026-25506

MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18.

Database specific

{
    "cwe_ids": [
        "CWE-787"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25506.json"
}

References

Affected packages

Git / github.com/dun/munge

Affected ranges

Type: GIT
Repo: https://github.com/dun/munge
Events: Introduced

c6e642c98ef411379a9596ac2c6061a870148d7a

Fixed

29461bd81a1e28ee877343027ecf965e06e66832

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25506.json"