What is CVE-2026-67620?

CVE-2026-67620 is a high-severity vulnerability in Flowiseai Flowise, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-08-08.

How severe is CVE-2026-67620?

High severity. CVSS v3 base score is 7.7 out of 10.

Is CVE-2026-67620 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Flowiseai Flowise

CVE-2026-67620

Flowise through 3.1.4 contains a server-side request forgery vulnerability in the SSRF guard implemented in httpSecurity.ts, where the DEFAULT_DENY_LIST omits the Oracle Cloud Infrastructure metadata endpoint 192.0.0.192 and the Alibaba Cloud metadata endpoint 100.100.100.200, allowing authenticated attackers to force the server to issue arbitrary GET requests to cloud instance metadata services. Attackers can send requests to the fetch-links API endpoint with a crafted URL parameter, bypassing deny-list validation including redirect-based bypasses, to reach instance metadata services and expose instance identity data and role credentials on Oracle Cloud Infrastructure or Alibaba Cloud deployments, with unauthenticated access possible when URL-fetching nodes exist in public chatflows.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-08-08 · last modified 2026-09-04.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.2th percentile), scored 2026-09-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Flowiseai Flowise — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

abdugafforov-bobur/CVE-2026-67620-poc

References

flowiseai.com/sunset (vendor-advisory, Not Applicable)
github.com/abdugafforov-bobur/CVE-2026-67620-poc (Exploit, technical-description, Third Party Advisory, exploit, Mitigation)
www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incomplete-d… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-67620?: CVE-2026-67620 is a high-severity vulnerability in Flowiseai Flowise, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-08-08.
How severe is CVE-2026-67620?: High severity. CVSS v3 base score is 7.7 out of 10.
Is CVE-2026-67620 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.