Buffer overflow in Opensips
CVE-2026-110679
A vulnerability was determined in OpenSIPS up to 3.6.8/4.0.1. The impacted element is the function rtpproxy_offer/rtpproxy_answer of the component rtpproxy. This manipulation causes out-of-bounds read. The attack may be initiated remotely. Upgrading to version 3.6.9 and 4.0.2 is sufficient to resolve this issue. It is advisable to upgrade the affected component.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Opensips — versions 3.6.0, 3.6.1, 3.6.2
Weakness classification (CWE)
References
- vuldb.com/vuln/419834 (technical-description, vdb-entry)
- vuldb.com/vuln/419834/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-110679 (third-party-advisory)
- vuldb.com/submit/1003897 (third-party-advisory)
- github.com/OpenSIPS/opensips/security/advisories/GHSA-qv9x-v8jq-434w (related)
- github.com/OpenSIPS/opensips/releases/tag/4.0.2 (patch)
- github.com/OpenSIPS/opensips/ (product)
Frequently asked questions
- What is CVE-2026-110679?
- CVE-2026-110679 is a high-severity vulnerability in Opensips, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.3/10. Published 2026-10-14.
- How severe is CVE-2026-110679?
- High severity. CVSS v3 base score is 7.3 out of 10.