ClosedPatched

Langflow: Missing Authentication Vulnerability

Langflow

Langflow contains a missing authentication vulnerability in the /api/v1/validate/code endpoint that allows a remote, unauthenticated attacker to execute arbitrary code via crafted HTTP requests. Added to CISA KEV on 2025-05-05.

Why this severity: CVSS 9.8 (CNA, v3.1); actively exploited (CISA KEV); known ransomware use

Started: May 5, 2025
Closed: May 5, 2025
CVE: CVE-2025-3248

Follow this incident

Updated May 5, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

May 5, 2025
CISA added CVE-2025-3248 to the KEV catalog (due 2025-05-26).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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