CVE-2026-7658 Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement
Attackers can exploit path traversal in username validation to delete directories, destroy cross-tenant data, and remove JWT signing keys in Langflow OSS.
- 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-2026-7658?
CVE-2026-7658 is a medium-severity path traversal vulnerability in Langflow Langflow, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate the username field, allowing attackers to inject path traversal sequences and bypass containment checks. This enables multiple severe impacts, including arbitrary directory deletion, cross-tenant data destruction, and JWT signing key deletion leading to session invalidation.
Weakness: CWE-22
Which versions are affected by CVE-2026-7658?
It affects 1 product.
Products include Langflow Langflow.
How do I fix CVE-2026-7658?
No fix has been published for CVE-2026-7658 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-7658 being exploited?
There is no known exploitation of CVE-2026-7658 in the wild and no public exploit code.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-59wg-6v2q-cr6p.