What is CVE-2026-93962?

CVE-2026-93962 is a high-severity vulnerability in Kamailio, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.3/10. Published 2026-09-20.

How severe is CVE-2026-93962?

High severity. CVSS v3 base score is 8.3 out of 10.

Buffer overflow in Kamailio

CVE-2026-93962

A weakness has been identified in Kamailio up to 5.8.8/6.0.7/6.1.4/6.2.0-dev1. The impacted element is the function shm_malloc of the file src/modules/cdp/receiver.c of the component CDP Diameter Receiver. Executing a manipulation can lead to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 6.0.8 is sufficient to resolve this issue. This patch is called 38711a3e788de0130d48cb485578c482b57d9351/4f62235b6f477b649c5cc18b0c81b4e26c949b98/4f62235b6f477b649c5cc18b0c81b4e26c949b98. You should upgrade the affected component.

Vulnerability class: Buffer Overflow

Published 2026-09-20 · last modified 2026-09-22.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.007 (52.8th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Kamailio — versions 5.8.0, 5.8.1, 5.8.2

Weakness classification (CWE)

References

github.com/kamailio/kamailio/ (product)
github.com/kamailio/kamailio/commit/38711a3e788de0130d48cb485578c482b57d9351 (patch)
github.com/kamailio/kamailio/issues/4876 (issue-tracking, exploit)
github.com/kamailio/kamailio/pull/4877 (issue-tracking, patch)
github.com/kamailio/kamailio/releases/tag/6.0.8 (patch)
vuldb.com/cve/CVE-2026-93962 (third-party-advisory)
vuldb.com/submit/944244 (third-party-advisory)
vuldb.com/vuln/407921 (technical-description, vdb-entry)
vuldb.com/vuln/407921/cti (signature, permissions-required)

Frequently asked questions

What is CVE-2026-93962?: CVE-2026-93962 is a high-severity vulnerability in Kamailio, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.3/10. Published 2026-09-20.
How severe is CVE-2026-93962?: High severity. CVSS v3 base score is 8.3 out of 10.