Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2025-3248

CVE-2025-3248CRITICAL

langflow-ai langflow — Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS    %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .9999   100.0   YES

AFFECTED
  Product   Versions     Fixed
  langflow  unspecified  —

TIMELINE
  Apr 4   Reserved by VulnCheck
  Apr 7   Published (CNA: VulnCheck)
  May 5   Added to CISA KEV, remediation due 2025-05-26

CWE-306 · CNA: VulnCheck · CVSS v3.1 · 5 references · KEV due May 26, 2025

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 4, 2025	Reserved	Reserved by VulnCheck
April 7, 2025	Published	Published (CNA: VulnCheck)
May 5, 2025	KEV ADDED	Added to CISA KEV, remediation due 2025-05-26

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
langflow-ai	langflow	—	—	—

Weaknesses

CWE-306

References (5)

https://github.com/langflow-ai/langflow/pull/6911 [issue-tracking]
https://github.com/langflow-ai/langflow/releases/tag/1.3.0 [release-notes]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248 [government-resource]
https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/ [exploit]
https://www.vulncheck.com/advisories/langflow-unauthenticated-rce [third-party-advisory]

Authoritative record: CVE-2025-3248 at cve.org

Vendors: langflow-ai

Weaknesses: CWE-306

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-3248 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.