# CVE-2025-34291

## Summary

- **CVE ID:** CVE-2025-34291
- **Severity:** CRITICAL
- **CVSS Score:** 9.4 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)
- **CWE:** CWE-346
- **Published:** Dec 5, 2025
- **Last Modified:** Jul 14, 2026

## 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.

## Affected Products

- Langflow — Langflow (0)

## References

- [CNA](https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform)
- [CNA](https://github.com/langflow-ai/langflow)
- [CNA](https://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce)
- [CISA-ADP](https://www.crowdsec.net/vulntracking-report/cve-2025-34291)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 83.63%
- **EPSS Percentile:** 99.7

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** May 21, 2026
- **Due Date:** Jun 4, 2026

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._