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CVE-2025-3248: Langflow Missing Authentication Vulnerability

criticalknown exploitedpublic exploitCVE-2025-3248
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Langflowproduct: LangflowRemote code execution
What
This vulnerability allows a remote, unauthenticated attacker to execute arbitrary code via crafted HTTP requests.
Who is affected
Users of Langflow are affected.
Urgency
Remediation is critical due to active exploitation.
Action
Users should apply the latest security updates for Langflow.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-05-05
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-3248

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-3248coverage & exploitation statusNVD · CVE.org

Recent advisories for Langflow Missing Authentication

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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