CVE-2026-39864

MEDIUM

Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks

Title source: cna
STIX 2.1

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)

Core 1
Core References

Scores

CVSS v3 4.4
EPSS 0.0030
EPSS Percentile 21.5%
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