CVE-2025-3248
Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
At a glance
- Severity
- CRITICAL 9.8
- Exploitation
- Known exploited (CISA KEV) · added 2025-05-05
Exploited per ENISA since 2025-05-05 - EPSS
- EPSS 99.99 % · percentile 100 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- VulnCheck
- NVD status
- Analyzed
Description
Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · disclosure@vulncheck.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
Weaknesses (CWE)
Advisories
- GHSA-rvqx-wpfh-mfx7 — Langflow Unauth RCE
- PYSEC-2025-36 — Langflow versions prior to 1.3.0 are susceptible to code injection in
- PYSEC-2026-380 — Langflow Unauth RCE
European references
- ENISA EUVD · EUVD-2025-10011
- GCVE · GCVE-0-2025-3248
Affected configurations (NVD CPE)
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*< 1.3.0
Affected products
| Product | Versions |
|---|---|
| langflow-ai · langflow | affected 0 < 1.3.0 |
References
- https://github.com/langflow-ai/langflow/pull/6911
- https://github.com/langflow-ai/langflow/releases/tag/1.3.0
- https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
- https://www.vulncheck.com/advisories/langflow-unauthenticated-rce
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| CISA Known Exploited Vulnerabilities | CC0 1.0 |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |