What is CVE-2026-18650?

CVE-2026-18650 is a high-severity vulnerability in Havelsan Inc. Liman Mys, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-08-04.

How severe is CVE-2026-18650?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Havelsan Inc. Liman Mys

CVE-2026-18650

Missing Authorization vulnerability in HAVELSAN Inc. Liman MYS allows Privilege Escalation. This issue affects Liman MYS: from 2.2.3 before 2.3.1.

Vulnerability class: Broken Access Control

Published 2026-08-04 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.0th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Havelsan Inc. Liman Mys — versions 2.2.3

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0741 (government-resource)

Frequently asked questions

What is CVE-2026-18650?: CVE-2026-18650 is a high-severity vulnerability in Havelsan Inc. Liman Mys, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-08-04.
How severe is CVE-2026-18650?: High severity. CVSS v3 base score is 8.8 out of 10.