CVE-2026-90690

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-09-14. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.3
EG Score
7.3(high)
EG Risk
64(Attend)
EG Risk 64/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
70%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: github_pr.
github_pr

Fix command injection via additional_args across all /api/tools/* endpoints

Upstream fix in progress (PR #266 · 0x4m4/hexstrike-ai, state=open)

https://github.com/0x4m4/hexstrike-ai/pull/266
generic🟡 PoC Available

Remote Code Execution via Command Injection in 90+ Tool Endpoints (`/api/tools/*`) · Issue #224 · 0x4m4/hexstrike-ai · GitHub

https://github.com/0x4m4/hexstrike-ai/issues/224

Vendor Advisories for CVE-2026-90690(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-21 15:37 UTCGHSA enrichment
  2. 2026-09-21 02:28 UTCGHSA enrichment
  3. 2026-09-20 13:18 UTCGHSA enrichment
  4. 2026-09-20 00:09 UTCEG score recompute
  5. 2026-09-20 00:09 UTCGHSA enrichment
  6. 2026-09-19 11:00 UTCGHSA enrichment
  7. 2026-09-18 21:51 UTCEG score recompute
  8. 2026-09-18 21:51 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 08:43 UTCGHSA enrichment
  11. 2026-09-17 19:34 UTCEG score recompute
  12. 2026-09-17 19:34 UTCGHSA enrichment
  13. 2026-09-17 19:32 UTCEPSS rescore
  14. 2026-09-17 04:38 UTCGHSA enrichment
  15. 2026-09-16 15:29 UTCEG score recompute
  16. 2026-09-16 15:29 UTCGHSA enrichment
  17. 2026-09-16 15:19 UTCNVD updateCVSS v4 → 5.5
  18. 2026-09-16 14:51 UTCEG score recompute
  19. 2026-09-16 14:51 UTCGHSA enrichment
  20. 2026-09-16 14:50 UTCMITRE cvelistV5CVSS v4 → 6.9
  21. 2026-09-16 14:09 UTCEPSS rescore
  22. 2026-09-16 12:32 UTCEG score recompute
  23. 2026-09-16 12:32 UTCGHSA enrichment
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-15 23:24 UTCGHSA enrichment
Show 10 more
  1. 2026-09-15 10:15 UTCEG score recompute
  2. 2026-09-15 10:15 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-14 21:05 UTCGHSA enrichment
  5. 2026-09-14 20:30 UTCEG score recompute
  6. 2026-09-14 20:30 UTCGHSA enrichment
  7. 2026-09-14 07:21 UTCEG score recompute
  8. 2026-09-14 07:20 UTCNVD updateCVSS v4 → 5.5
  9. 2026-09-14 06:55 UTCEG score recompute
  10. 2026-09-14 06:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90690?
CVE-2026-90690 is a high vulnerability published on September 14, 2026. A weakness has been identified in 0x4m4 HexStrike AI up to d689933ff579d839c676c82b231f8e98326c5f04. The affected element is the function subprocess.Popen of the file hexstrikeserver.py of the component API Tools Endpoint. Executing a manipulation of the argument…
When was CVE-2026-90690 disclosed?
CVE-2026-90690 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90690 actively exploited?
CVE-2026-90690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 29.8% of all scored CVEs.
What is the CVSS score of CVE-2026-90690?
CVE-2026-90690 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-90690?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90690, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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