CVE-2026-39864CWE-125

Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks

Medium · published April 8, 2026

CVSS v3.1
4.4
EPSS
1%
Percentile
44.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00544 · 44.9th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-04-08T19:58Z
EPSS history
Timeline
  • 08 APR 19:58Z
    Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks
    cvelistv5