CVE-2026-56273: Flowise before 3.1.0 contains a path traversal vulnerability in Faiss and SimpleStore vector store implementations that accept unsanitized basePath parameters from authenticated us

mediumCVSS 6.5CVE-2026-56273

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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.5
Published: 2026-07-08
Last updated: 2026-07-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-56273

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-562730.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-56273	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] Flowise: Multiple vulnerabilitiescert-bund

Recent advisories for Flowise

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

critical[UPDATE] [critical] Flowise: Multiple vulnerabilitiescert-bund · 2026-07-10
high[UPDATE] [high] Flowise: Multiple vulnerabilitiescert-bund · 2026-07-09
criticalCVE-2026-56278: Flowise before 3.1.0 (affected versions 3.0.13 and earlier) uses a weak hardcoded default secr…nvd · 2026-06-30
mediumCVE-2026-56277: Flowise before 3.1.2 sets Access-Control-Allow-Origin to a hardcoded wildcard (*) on its text-…nvd · 2026-06-30
mediumCVE-2026-58057: Flowise before 3.1.3 validates Custom MCP stdio environment variables against a denylist using…nvd · 2026-06-28
criticalCVE-2025-71338: Flowise contains a path traversal vulnerability in the /api/v1/document-store/loader/process e…nvd · 2026-06-25