PT-2026-31443 · Kamailio · Kamailio

Published 2026-04-08 · Updated 2026-04-08 · CVE-2026-39864

Positive Technologies (AI Summary)

CVSS v3.1

4.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Kamailio versions prior to 6.0.5 and 5.8.7

Description Kamailio, an open source SIP Signaling Server, contains a flaw in the auth module. A specially crafted SIP packet can trigger an out-of-bounds read, leading to a denial of service (process crash) if a successful user authentication occurs without a database backend, followed by further user identity checks.

Recommendations Update to version 6.0.5 or 5.8.7

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-39864

Affected Products

Kamailio

References · 8

• https://github.com/kamailio/kamailio/security/advisories/GHSA-6m86-m342-g48m · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-39864 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-39864 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-39864 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39864 · Security Note
• https://ubuntu.com/security/CVE-2026-39864 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-39864 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2041983186960253077 · Twitter Post