CVE-2026-86237

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-07. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

A vulnerability was found in openagents-org openagents up to 0.8.19/0.9.3.post20. Impacted is the function test_default_model of the file sdk/src/openagents/sdk/transports/http.py. Performing a manipulation of the argument base_url results in server-side request forgery. The attack may be initiated remotely. The exploit has been made public and could be used. Endpoint and both sinks unchanged since filing; only the file moved (e277dd1a). Maintainer closed as inapplicable yet the identical unguarded code still ships in 0.9.3.post20. Sibling admin endpoints do call the shipped-but-unused-by-this-handler _require_admin().

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

GitHub - openagents-org/openagents: OpenAgents - The collaboration OS for AI agents · GitHub

https://github.com/openagents-org/openagents/
generic

OpenAgents HTTP Transport: Unauthenticated SSRF via test_default_model Endpoint · Issue #566 · openagents-org/openagents · GitHub

https://github.com/openagents-org/openagents/issues/566

Vendor Advisories for CVE-2026-86237(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 19× in last 7d / 43× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 15:19 UTCEG score recompute
  3. 2026-09-20 15:19 UTCGHSA enrichment
  4. 2026-09-19 13:43 UTCEG score recompute
  5. 2026-09-19 13:43 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 12:10 UTCEG score recompute
  8. 2026-09-18 12:10 UTCGHSA enrichment
  9. 2026-09-17 19:32 UTCEPSS rescore
  10. 2026-09-17 10:35 UTCEG score recompute
  11. 2026-09-17 10:35 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 08:59 UTCEG score recompute
  14. 2026-09-16 08:59 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 06:59 UTCEG score recompute
  17. 2026-09-15 06:59 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 05:26 UTCEG score recompute
  21. 2026-09-14 05:26 UTCGHSA enrichment
  22. 2026-09-13 03:55 UTCEG score recompute
  23. 2026-09-13 03:55 UTCGHSA enrichment
  24. 2026-09-12 02:23 UTCEG score recompute
  25. 2026-09-12 02:23 UTCGHSA enrichment
Show 18 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 00:51 UTCEG score recompute
  4. 2026-09-11 00:51 UTCGHSA enrichment
  5. 2026-09-09 23:19 UTCEG score recompute
  6. 2026-09-09 23:19 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-08 19:54 UTCEG score recompute
  9. 2026-09-08 19:54 UTCGHSA enrichment
  10. 2026-09-08 19:30 UTCNVD updateCVSS v4 → 5.5
  11. 2026-09-08 18:29 UTCMITRE cvelistV5CVSS v4 → 6.9
  12. 2026-09-08 14:06 UTCGHSA enrichment
  13. 2026-09-08 03:01 UTCEG score recompute
  14. 2026-09-08 03:01 UTCGHSA enrichment
  15. 2026-09-07 01:29 UTCEG score recompute
  16. 2026-09-07 01:28 UTCNVD updateCVSS v4 → 5.5
  17. 2026-09-07 00:44 UTCEG score recompute
  18. 2026-09-07 00:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86237?
CVE-2026-86237 is a medium vulnerability published on September 7, 2026. A vulnerability was found in openagents-org openagents up to 0.8.19/0.9.3.post20. Impacted is the function testdefaultmodel of the file sdk/src/openagents/sdk/transports/http.py. Performing a manipulation of the argument baseurl results in server-side request forgery. The attack may be initiated…
When was CVE-2026-86237 disclosed?
CVE-2026-86237 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86237 actively exploited?
CVE-2026-86237 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 57.2% of all scored CVEs.
What is the CVSS score of CVE-2026-86237?
CVE-2026-86237 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-86237?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86237, 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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