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CVE-2025-34291 is an origin validation error in Langflow versions through 1.6.9. The vulnerability chain combines an overly permissive credentialed CORS configuration, a refresh-token cookie configured with SameSite=None, and absent CSRF protections on the token-refresh operation. A malicious origin can induce a victim’s browser to submit credentialed cross-origin refresh requests and receive newly issued access and refresh tokens for the victim session. The attacker can then use the stolen authenticated session to access Langflow functionality capable of executing user-supplied code, resulting in remote code execution.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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.
67 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity Langflow origin-validation error vulnerability.
Langflow browser-session trust and origin-validation vulnerability that can enable account takeover and RCE.
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.
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.