CVE-2026-39864

MEDIUM

Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks

Title source: cna

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.

References (1)

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

Scores

CVSS v3 4.4

EPSS 0.0020

EPSS Percentile 42.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-125

Status published

Products (2)

kamailio/kamailio < 5.8.7 (2 CPE variants)

kamailio/kamailio >= 6.0.0, < 6.0.5

Published Apr 08, 2026

Tracked Since Apr 09, 2026