CVE-2026-51886
Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description
Impact
langflow-ai langflow v1.9.3 is affected by: Code Injection. The impact is: execute arbitrary code (remote). The component is: src/backend/base/langflow/api/v1/validate.py:validate-post_validate_code-a-real-authenticated-http-post-to-api-v1. The attack vector is: Attack surface: HTTP or browser-backed service path. A public-facing route accepts raw Python source and forwards it into a server-side compile/exec validation path without any visible entitlement guard. ¶¶ A weakness has been identified in langflow-ai langflow up to 1.9.3. langflow contains a code injection vulnerability in validate-post_validate_code-a-real-authenticated-http-post-to-api-v1 (src/backend/base/langflow/api/v1/validate.py:13). An authenticated attacker can execute arbitrary Python code on the server by submitting malicious code to the /api/v1/validate/code endpoint, which directly executes user-supplied code without sandboxing or security controls.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | langflow | >= 1.7.2, < 1.10.1 | 1.10.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w584-2h2r-2hvf
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-w584-2h2r-2hvf
- https://nvd.nist.gov/vuln/detail/CVE-2026-51886
- https://github.com/langflow-ai/langflow/issues/13336
- https://github.com/langflow-ai/langflow/pull/13696
- https://github.com/langflow-ai/langflow/commit/e7c33dbaade20b5295c7fa26bf83cc1ff68fba02
- https://gist.github.com/Ro1ME/c11b1e63e4e8fca6b25275144f25ec2a
- https://github.com/langflow-ai/langflow/releases/tag/v1.10.1