CVE-2026-39864

Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks

State: Published
Severity: 4.4 Medium
Published: Apr 8, 2026
Updated: Apr 8, 2026
Reserved: Apr 7, 2026

Description

Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.

Scores

CVSS	Score	Vector	Source
3.1	4.4 Medium	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
kamailiokamailio	< 5.8.7Affected >= 6.0.0, < 6.0.5Affected

References

https://github.com/kamailio/kamailio/security/advisories/GHSA-6m86-m342-g48m

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