CVE-2026-91935

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. a secondary CVSS source baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: Elevated riskExposed: 0

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

Flowise before 3.1.4 fails to validate baseURL parameters in chat-model nodes, allowing authenticated users to redirect requests to arbitrary hosts. Attackers with chatflows:create or chatflows:update permissions can exfiltrate LLM provider API keys by redirecting requests to cloud metadata services or internal hosts.

CVSS v3
8.3
EG Score
8.3(high)
EG Risk
53(Track*)
EG Risk 53/100SSVC: 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
Severity83% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 20, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Flowise before 3.1.4 SSRF and API Key Exfiltration via Chat Model Nodes | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flowise-before-3.1.4-ssrf-and-api-key-exfiltration-via-chat-model-nodes
github Patch Available🟡 PoC Available

SSRF + LLM API key exfiltration via user-controlled basepath / baseUrl in 8 chat-model nodes · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-hx55-h48h-7rw9

Vendor Advisories for CVE-2026-91935(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 27× in last 7d / 27× 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 03:10 UTCEG score recompute
  2. 2026-09-21 03:10 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 14:22 UTCEG score recompute
  5. 2026-09-20 14:21 UTCGHSA enrichment
  6. 2026-09-20 01:31 UTCEG score recompute
  7. 2026-09-20 01:31 UTCGHSA enrichment
  8. 2026-09-20 01:02 UTCEG score recompute
  9. 2026-09-20 01:02 UTCGHSA enrichment
  10. 2026-09-19 14:17 UTCGHSA enrichment
  11. 2026-09-19 01:28 UTCEG score recompute
  12. 2026-09-19 01:28 UTCGHSA enrichment
  13. 2026-09-18 19:28 UTCEPSS rescore
  14. 2026-09-18 12:39 UTCGHSA enrichment
  15. 2026-09-17 23:49 UTCEG score recompute
  16. 2026-09-17 23:49 UTCGHSA enrichment
  17. 2026-09-17 19:32 UTCEPSS rescore
  18. 2026-09-17 09:56 UTCGHSA enrichment
  19. 2026-09-16 21:07 UTCGHSA enrichment
  20. 2026-09-16 18:11 UTCEG score recompute
  21. 2026-09-16 18:11 UTCGHSA enrichment
  22. 2026-09-16 14:09 UTCEPSS rescore
  23. 2026-09-16 05:22 UTCEG score recompute
  24. 2026-09-16 05:22 UTCGHSA enrichment
  25. 2026-09-15 16:33 UTCEG score recompute
Show 2 more
  1. 2026-09-15 15:24 UTCEG score recompute
  2. 2026-09-15 15:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91935?
CVE-2026-91935 is a high vulnerability published on September 15, 2026. Flowise before 3.1.4 fails to validate baseURL parameters in chat-model nodes, allowing authenticated users to redirect requests to arbitrary hosts. Attackers with chatflows:create or chatflows:update permissions can exfiltrate LLM provider API keys by redirecting requests to cloud metadata…
When was CVE-2026-91935 disclosed?
CVE-2026-91935 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91935 actively exploited?
CVE-2026-91935 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 79.8% of all scored CVEs.
What is the CVSS score of CVE-2026-91935?
CVE-2026-91935 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-91935?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91935, 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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