CVE-2026-55255: Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow
(updated )
Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim’s flow ID in the request.
References
- github.com/advisories/GHSA-qrpv-q767-xqq2
- github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e
- github.com/langflow-ai/langflow/pull/12832
- github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
- github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-221.yaml
- nvd.nist.gov/vuln/detail/CVE-2026-55255
- webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255
Code Behaviors & Features
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