CVE-2026-127214
Flowise 3.1.4 SSRF Bypass via Custom Function Sandbox
Flowise through 3.1.4 contains a server-side request forgery vulnerability that allows authenticated attackers with chatflows or agentflows create/update permissions to bypass the Custom Function sandbox's SSRF protection by requiring a module subpath inside an allowlisted package, such as axios/dist/node/axios.cjs or node-fetch/lib/index.js, which evades the vm2 mock table and returns an unwrapped HTTP client that skips the checkDenyList validation. Attackers can issue arbitrary GET and POST requests with attacker-controlled bodies via POST /api/v1/node-custom-function to reach loopback and internal-network addresses or the cloud metadata endpoint, enabling network mapping, credential disclosure, and state changes on internal services.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Flowise FlowiseAI FlowiseAI/Flowise
github |
≥ 0; ≤ 3.1.4 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:N | CNA: VulnCheck |
| 3.1 / 8.5 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N | CNA: VulnCheck |
Exploit evidence
- https://github.com/soovwv/cve/blob/main/research/flowise-ssrf-bypass-via-subpath-import.md
exploit · CNA: VulnCheck
References
- https://github.com/soovwv/cve/blob/main/research/flowise-ssrf-bypass-via-subpath-import.mdCNA: VulnCheck · technical-description, exploit
- https://www.vulncheck.com/advisories/flowise-ssrf-bypass-via-custom-function-sandboxCNA: VulnCheck · third-party-advisory
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