CVE-2025-34291

Description

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.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Exploits

References

• https://nvd.nist.gov/vuln/detail/CVE-2025-34291
• https://github.com/langflow-ai/langflow/pull/10139
• https://github.com/langflow-ai/langflow/pull/10696
• https://github.com/langflow-ai/langflow/pull/9240
• https://github.com/langflow-ai/langflow/pull/9441
• https://github.com/langflow-ai/langflow
• https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform
• https://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291
• https://www.crowdsec.net/vulntracking-report/cve-2025-34291
• This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/langflow-ai/langflow ; https://github.com/langflow-ai/langflow/releases/tag/v1.9.3; https://github.com/langflow-ai/langflow/issues/11465#event-25774545848 ; https://nvd.nist.gov/vuln/detail/CVE-2025-34291

CWEs

CWE-346