CVE-2026-8505 · GHSA-cf6m-vc3m-7cgm
Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass
- Risk score
- 80/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 0.7%
- Published
- 17 Jul 2026
Open in the live forecast Today's forecast
What to know
- What it is
- IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allo…
- Affected
- langflow (pip) >= 1.7.0, <= 1.9.0
- Fix
- Upgrade langflow to 1.9.1 or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.8 critical
- Remotely exploitable without logging in
- On your watchlist: PyPI
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| langflow | pip | >= 1.7.0, <= 1.9.0 | 1.9.1 |
References
- https://github.com/advisories/GHSA-cf6m-vc3m-7cgm
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-cf6m-vc3m-7cgm
- https://nvd.nist.gov/vuln/detail/CVE-2026-8505
- https://github.com/langflow-ai/langflow/pull/12845
- https://github.com/langflow-ai/langflow/commit/cb6f7508dda83ead9c3e4417e96e4b5bd9a260c3
- https://github.com/langflow-ai/langflow/releases/tag/v1.9.1
- https://www.ibm.com/support/pages/node/7278921
- https://github.com/advisories/GHSA-cf6m-vc3m-7cgm
Original description
IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).
Last activity 5 Oct 2026. Patch Forecast updates every hour.