CVE-2026-3357 IBM Langflow Desktop FAISS Vector Store Remote Code Execution via malicious Pickle file
An authenticated user can execute arbitrary code via malicious Pickle files in the FAISS component due to insecure deserialization.
- 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-2026-3357?
CVE-2026-3357 is a high-severity unsafe deserialization vulnerability in Langflow Langflow, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM Langflow Desktop 1.6.0 through 1.8.2 Langflow could allow an authenticated user to execute arbitrary code on the system, caused by an insecure default setting which permits the deserialization of untrusted data in the FAISS component.
Weakness: CWE-502
Which versions are affected by CVE-2026-3357?
It affects 1 product.
Products include Langflow Langflow.
How do I fix CVE-2026-3357?
No fix has been published for CVE-2026-3357 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-3357 being exploited?
There is no known exploitation of CVE-2026-3357 in the wild and no public exploit code.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-g2wf-gm3w-w9x3.