What is CVE-2026-56273?

CVE-2026-56273 is a medium-severity vulnerability in Flowise, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-07-08.

How severe is CVE-2026-56273?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in Flowise

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 users. Attackers with valid API tokens can write vector store data to arbitrary filesystem locations, potentially enabling code execution or data exfiltration.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (26.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Flowise — versions 0, 3.1.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56273?: CVE-2026-56273 is a medium-severity vulnerability in Flowise, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-07-08.
How severe is CVE-2026-56273?: Medium severity. CVSS v3 base score is 6.5 out of 10.