CVE-2026-39864 MEDIUM

CVE-2026-39864: Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks

Vendor Kamailio
Product kamailio
Weakness CWE-125
Published April 8, 2026
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

4.4/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 8, 2026 CVE published
April 8, 2026 Record updated