What is CVE-2026-90620?

CVE-2026-90620 is a high-severity vulnerability in 0x4m4 Hexstrike Ai, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-09-14.

How severe is CVE-2026-90620?

High severity. CVSS v3 base score is 7.3 out of 10.

Auth bypass in 0x4m4 Hexstrike Ai

CVE-2026-90620

A vulnerability was determined in 0x4m4 HexStrike AI up to d689933ff579d839c676c82b231f8e98326c5f04. The impacted element is an unknown function of the file hexstrike_server.py of the component API Command Endpoint. This manipulation causes missing authentication. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

Vulnerability class: Broken Authentication

EPSS: 0.004 (32.6th percentile) — read the EPSS interpretation.

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.

Affected products

0x4m4 Hexstrike Ai — versions d689933ff579d839c676c82b231f8e98326c5f04

Weakness classification (CWE)

References

cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (vdb-entry)
cna@vuldb.com (signature, permissions-required)

Frequently asked questions

What is CVE-2026-90620?: CVE-2026-90620 is a high-severity vulnerability in 0x4m4 Hexstrike Ai, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-09-14.
How severe is CVE-2026-90620?: High severity. CVSS v3 base score is 7.3 out of 10.