CVE-2026-56273: Flowise - Path Traversal in Vector Store basePath Parameter

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-08 · updated 2026-07-09
Weakness: CWE-22

Description

Flowise before 3.1.0 contains a path traversal vulnerability in Faiss and SimpleStore vector store implementations that accept unsanitized basePath parameters from authenticated users. Attackers with valid API tokens can write vector store data to arbitrary filesystem locations, potentially enabling code execution or data exfiltration.

Affected products

FlowiseAI Flowise: before 3.1.0 — fixed in 3.1.0

How to fix

Upgrade to a fixed version: FlowiseAI Flowise 3.1.0. Check the vendor advisory for mitigations.

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w6v6-49gh-mc9w
https://www.vulncheck.com/advisories/flowise-path-traversal-in-vector-store-basepath-parameter
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w6v6-49gh-mc9w

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