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CVE-2025-34291 is a critical chained vulnerability in Langflow affecting versions up to and including 1.6.9. The issue arises from an overly permissive CORS configuration that allows any origin while also permitting credentialed cross-origin requests, combined with a refresh token cookie configured with SameSite=None. In this state, a malicious website can induce a victim’s browser to send authenticated cross-origin requests to Langflow’s token refresh endpoint and obtain fresh access and refresh tokens for the victim session. Those tokens can then be used to access authenticated Langflow functionality, including built-in code-execution features, resulting in account takeover and remote code execution on the host running Langflow. Reported analyses also describe the chain as lacking effective CSRF protection on the refresh flow, which contributes to the exploitability of the token-refresh step.
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No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
65 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously exploited Langflow flaw mentioned only as background.
A remote code execution vulnerability affecting Langflow that was exploited during MuddyWater reconnaissance and intrusion activity.
A previously disclosed Langflow vulnerability involving a CORS/CSRF chain leading to remote code execution, mentioned as part of the recurring pattern.
A Langflow vulnerability that has been weaponized by the Iranian state-sponsored threat actor MuddyWater.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.