Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-90690

CVE-2026-90690MEDIUM

0x4m4 HexStrike AI API Tools Endpoint hexstrike_server.py subprocess.Popen os command injection

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   L   L   L    5.5   .0211   81.1     —

AFFECTED
  Product       Versions                                    Fixed
  HexStrike AI  d689933ff579d839c676c82b231f8e98326c5f04 –  —

TIMELINE
  Sep 13  Reserved by VulDB
  Sep 14  Published (CNA: VulDB)
  Sep 16  EXPLOIT PUBLISHED — CVE-2026-90690 (0x4m4 HexStrike AI). Public exploit reference added.

CWE-77, CWE-78 · CNA: VulDB · CVSS v4.0 · 6 references · NVD status: Deferred

Description

A weakness has been identified in 0x4m4 HexStrike AI up to d689933ff579d839c676c82b231f8e98326c5f04. The affected element is the function subprocess.Popen of the file hexstrike_server.py of the component API Tools Endpoint. Executing a manipulation of the argument additional_args/target/username/password/scan_type/payload can lead to os command injection. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. A fix appears to be in progress.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 13, 2026	Reserved	Reserved by VulDB
September 14, 2026	Published	Published (CNA: VulDB)
September 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-90690 (0x4m4 HexStrike AI). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
0x4m4	HexStrike AI	—	d689933ff579d839c676c82b231f8e98326c5f04	—

Weaknesses

CWE-77 · CWE-78

References (6)

Authoritative record: CVE-2026-90690 at cve.org

Vendors: 0x4m4

Weaknesses: CWE-77 · CWE-78

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-90690 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.