CVE-2026-39864
Medium · 4.4CVSS
4.4
EPSS
0.5%
Published
Apr 8, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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