Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2025-34291

Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.025
EPSS Ranking 84.8%
CVSS Severity
CVSS v3 Score 8.8
Products affected by CVE-2025-34291


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