CVE-2026-85666

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-04. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

OGX (formerly Llama Stack, affected at commit fbe8e0f) contains an unauthenticated server-side request forgery vulnerability in the OpenAI-compatible POST /v1/responses endpoint. MCP tool definitions accept a server_url parameter (along with headers and authorization values) that is fetched server-side without destination validation; the existing validate_url_not_private() guard used for other URL inputs is not applied to server_url. On the default starter configuration, which runs without authentication, a remote unauthenticated attacker can cause the server to open connections to arbitrary internal addresses (including cloud metadata endpoints such as http://169.254.169.254/) and forward attacker-supplied headers and bearer tokens to those destinations.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 14, 2026

Advisory Details (4)

Auto-updated Sep 4, 2026
No patch confirmed yet.
generic

ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ogx-1.3.1-server-side-request-forgery-via-mcp-tool-server-url
generic

ogx/src/ogx/providers/utils/tools/mcp.py at v1.3.1 · ogx-ai/ogx · GitHub

https://github.com/ogx-ai/ogx/blob/v1.3.1/src/ogx/providers/utils/tools/mcp.py
generic

GitHub - ogx-ai/ogx: Open GenAI Stack · GitHub

https://github.com/ogx-ai/ogx
generic

Unauthenticated Server-Side Request Forgery via MCP tool `server_url` in POST /v1/responses · Issue #6287 · ogx-ai/ogx · GitHub

https://github.com/ogx-ai/ogx/issues/6287

Vendor Advisories for CVE-2026-85666(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 32× in last 7d / 68× 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 09:49 UTCGHSA enrichment
  2. 2026-09-20 21:51 UTCEG score recompute
  3. 2026-09-20 21:51 UTCGHSA enrichment
  4. 2026-09-20 20:16 UTCEPSS rescore
  5. 2026-09-20 09:52 UTCGHSA enrichment
  6. 2026-09-19 21:54 UTCEG score recompute
  7. 2026-09-19 21:54 UTCGHSA enrichment
  8. 2026-09-19 09:55 UTCGHSA enrichment
  9. 2026-09-18 21:22 UTCEG score recompute
  10. 2026-09-18 21:22 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 09:14 UTCGHSA enrichment
  13. 2026-09-17 21:15 UTCEG score recompute
  14. 2026-09-17 21:15 UTCGHSA enrichment
  15. 2026-09-17 19:32 UTCEPSS rescore
  16. 2026-09-17 09:17 UTCGHSA enrichment
  17. 2026-09-16 21:19 UTCEG score recompute
  18. 2026-09-16 21:19 UTCGHSA enrichment
  19. 2026-09-16 14:09 UTCEPSS rescore
  20. 2026-09-16 09:01 UTCEG score recompute
  21. 2026-09-16 09:01 UTCGHSA enrichment
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-15 20:52 UTCGHSA enrichment
  24. 2026-09-15 08:25 UTCEG score recompute
  25. 2026-09-15 08:25 UTCGHSA enrichment
Show 43 more
  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-15 03:12 UTCEPSS rescore
  3. 2026-09-14 20:27 UTCEG score recompute
  4. 2026-09-14 20:27 UTCGHSA enrichment
  5. 2026-09-14 19:40 UTCEG score recompute
  6. 2026-09-14 19:40 UTCGHSA enrichment
  7. 2026-09-14 16:06 UTCGHSA enrichment
  8. 2026-09-14 04:07 UTCEG score recompute
  9. 2026-09-14 04:07 UTCGHSA enrichment
  10. 2026-09-13 16:09 UTCGHSA enrichment
  11. 2026-09-13 04:10 UTCGHSA enrichment
  12. 2026-09-12 16:11 UTCEG score recompute
  13. 2026-09-12 16:11 UTCGHSA enrichment
  14. 2026-09-12 04:13 UTCGHSA enrichment
  15. 2026-09-11 16:14 UTCEG score recompute
  16. 2026-09-11 16:14 UTCGHSA enrichment
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 04:15 UTCGHSA enrichment
  20. 2026-09-10 16:16 UTCEG score recompute
  21. 2026-09-10 16:16 UTCGHSA enrichment
  22. 2026-09-10 04:18 UTCGHSA enrichment
  23. 2026-09-09 16:20 UTCGHSA enrichment
  24. 2026-09-09 04:19 UTCEG score recompute
  25. 2026-09-09 04:18 UTCGHSA enrichment
  26. 2026-09-08 22:01 UTCEPSS rescore
  27. 2026-09-08 16:19 UTCGHSA enrichment
  28. 2026-09-08 03:20 UTCEG score recompute
  29. 2026-09-08 03:20 UTCGHSA enrichment
  30. 2026-09-07 15:22 UTCGHSA enrichment
  31. 2026-09-07 03:22 UTCGHSA enrichment
  32. 2026-09-06 15:20 UTCEG score recompute
  33. 2026-09-06 15:20 UTCGHSA enrichment
  34. 2026-09-06 13:48 UTCEPSS rescore
  35. 2026-09-06 03:19 UTCEG score recompute
  36. 2026-09-06 03:19 UTCGHSA enrichment
  37. 2026-09-05 15:31 UTCEPSS rescore
  38. 2026-09-05 15:21 UTCGHSA enrichment
  39. 2026-09-05 03:22 UTCEG score recompute
  40. 2026-09-05 03:22 UTCGHSA enrichment
  41. 2026-09-04 15:23 UTCEG score recompute
  42. 2026-09-04 14:45 UTCEG score recompute
  43. 2026-09-04 14:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85666?
CVE-2026-85666 is a high vulnerability published on September 4, 2026. OGX (formerly Llama Stack, affected at commit fbe8e0f) contains an unauthenticated server-side request forgery vulnerability in the OpenAI-compatible POST /v1/responses endpoint. MCP tool definitions accept a serverurl parameter (along with headers and authorization values) that is fetched…
When was CVE-2026-85666 disclosed?
CVE-2026-85666 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85666 actively exploited?
CVE-2026-85666 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.6% of all scored CVEs.
What is the CVSS score of CVE-2026-85666?
CVE-2026-85666 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-85666?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85666, 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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