CVE-2025-34291 (GCVE-0-2025-34291)

Vulnerability from cvelistv5 – Published: 2025-12-05 22:27 – Updated: 2025-12-05 22:27
VLAI?
Summary
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.
Severity ?
9.4 (Critical)
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 - Origin Validation Error
Assigner
References
Impacted products
Vendor Product Version
Langflow Langflow Affected: 0 , ≤ 1.6.9 (semver)
Create a notification for this product.
Credits
Fenix Qiao (aka 13ph03nix) from Obsidian Security Shuyang Wang from Obsidian Security
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