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VULNERABILITIES

CVE-2026-39863 Details

Description

Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer[email protected]

Affected Products

ProductVersions
kamailio kamailio
< 5.8.8
>= 6.0.0, < 6.0.6
6.1.0

CPE

  • cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:*
  • cpe:2.3:a:kamailio:kamailio:6.1.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-39863
NVD Published Date:
Apr 8, 2026
NVD Last Modified:
Jul 24, 2026
Source:
[email protected]
CVE-2026-39863 Details - Not Deferred