PT-2025-49321 · Langflow · Langflow

Shuyang Wang · Published 2025-12-05 · Updated 2026-05-22 · CVE-2025-34291

Positive Technologies (AI Summary)

CVSS v4.0

9.4

Critical

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Name of the Vulnerable Software and Affected Versions Langflow versions prior to 1.7.0

Description A chained issue enables account takeover and remote code execution. An overly permissive Cross-Origin Resource Sharing (CORS) configuration, where allow origins is set to '*' and allow credentials is set to True, combined with a refresh token cookie configured as SameSite=None, allows a malicious webpage to perform cross-origin requests that include credentials to call the refresh endpoint. This allows an attacker-controlled origin to obtain fresh access token and refresh token pairs for a victim session. These tokens provide access to authenticated endpoints, including built-in code-execution functionality, leading to arbitrary code execution and full system compromise. This issue has been actively exploited in the wild.

Recommendations Update to a version later than 1.6.9 to resolve the issue.

Exploit

Fix

RCE

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

CVE-2025-34291

GHSA-577H-P2HH-V4MV

PYSEC-2025-78

Affected Products

Langflow

References · 36

• 🔥 https://obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform · Exploit
• https://osv.dev/vulnerability/PYSEC-2025-78 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-34291 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-577h-p2hh-v4mv · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-34291 · Security Note
• https://github.com/langflow-ai/langflow · Note
• https://github.com/langflow-ai/langflow/pull/9441 · Note
• https://github.com/langflow-ai/langflow/pull/10696 · Note
• https://github.com/langflow-ai/langflow/pull/10139 · Note
• https://github.com/langflow-ai/langflow/pull/9240 · Note
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291 · Note
• https://twitter.com/Crowd_Security/status/2015798622282014980 · Twitter Post
• https://twitter.com/zench4n/status/2057646839407772153 · Twitter Post
• https://t.me/cveNotify/144972 · Telegram Post
• https://twitter.com/StackAttackAI/status/1997263531842973816 · Twitter Post