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TI-2026-61626 Aliases CVE-2026-90620GHSA-54w5-mmvv-3mhc

0x4m4 HexStrike AI API Command Endpoint hexstrike_server.py missing authentication

Priority HIGH 70CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00654 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
0x4m4HexStrike AId689933ff579d839c676c82b231f8e98326c5f04—No fix listedCNA
  • HexStrike AI Vendor0x4m4 Affected d689933ff579d839c676c82b231f8e98326c5f04 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:0x4m4:hexstrike_ai:*:*:*:*:*:*:*:*——0x4m4
  • cpe:2.3:a:0x4m4:hexstrike_ai:*:*:*:*:*:*:*:* Versions — — ·0x4m4

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-90620
  2. 2026-10-03 Alias added: GHSA-54w5-mmvv-3mhc
  3. 2026-10-13 EPSS moved to the 50th–90th percentile

References

Exploit 1

  • TI-2025-24558 HexStrike AI MCP Server Command Injection CVSS 3.1CRITICAL 9.1
  • TI-2026-61648 0x4m4 HexStrike AI API Files Endpoint hexstrike_server.py FileOperationsManager path traversal CVSS 4.0MEDIUM 6.9
  • TI-2026-61647 0x4m4 HexStrike AI API Tools Endpoint hexstrike_server.py subprocess.Popen os command injection CVSS 4.0MEDIUM 6.9
  • TI-2026-61625 0x4m4 HexStrike AI Execute Endpoint hexstrike_server.py os command injection CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences