PyPI/langflow CVE-2026-33017: critical 9.8, exploited, EPSS 96.18%

Unauthenticated Remote Code Execution in Langflow via Public Flow Build Endpoint

Action: Upgrade langflow to 1.9.0 or later.

pip install langflow==1.9.0

Affected

Fixed versions

Sources

• osv: GHSA-vwmf-pq79-vjvx
• kev: CVE-2026-33017
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-vwmf-pq79-vjvx
• https://nvd.nist.gov/vuln/detail/CVE-2026-33017
• https://github.com/langflow-ai/langflow/issues/12345
• https://github.com/langflow-ai/langflow/pull/12160
• https://github.com/langflow-ai/langflow/commit/73b6612e3ef25fdae0a752d75b0fabd47328d4f0
• https://github.com/advisories/GHSA-rvqx-wpfh-mfx7
• https://github.com/langflow-ai/langflow
• https://github.com/langflow-ai/langflow/releases/tag/1.8.2
• https://medium.com/@aviral23/cve-2026-33017-how-i-found-an-unauthenticated-rce-in-langflow-by-reading-the-code-they-already-dc96cdce5896
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33017
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33017
• https://www.sysdig.com/blog/cve-2026-33017-how-attackers-compromised-langflow-ai-pipelines-in-20-hours

CVE-2026-33017 · published 2026-03-17T20:05:05Z · modified 2026-06-29T12:26:04.313587101Z · JSON