CVE-2026-56273 Flowise - Path Traversal in Vector Store basePath Parameter
Authenticated attackers can exploit path traversal in Flowise vector stores to write data to arbitrary locations, potentially leading to code execution or data exfiltration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56273?
CVE-2026-56273 is a medium-severity path traversal vulnerability in Flowise, published on 8 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-56273?
4 open source packages ship an affected version, including flowise and flowise-components.
| Package | Affected | Fixed in |
|---|---|---|
flowise npm | All versions | 3.1.0 |
flowise npm | All versions | 3.1.0 |
flowise-components npm | All versions | 3.1.0 |
flowise-components npm | All versions | 3.1.0 |
How do I fix CVE-2026-56273?
Upgrade flowise to 3.1.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-56273 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56273 exists.
Sources
Also known as GHSA-g8g5-48h4-5r8h, GHSA-w6v6-49gh-mc9w.