CVE-2026-39864
Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | kamailio |
| Product | kamailio |
| Published | Apr 8, 2026 |
| Last Updated | Apr 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for kamailio kamailio
Be the first to know when new medium vulnerabilities affecting kamailio kamailio are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
kamailio / kamailio
< 5.8.7 >= 6.0.0, < 6.0.5