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CVE-2026-45301 affects Open WebUI, a self-hosted AI platform, in versions prior to 0.3.16. The vulnerability is caused by a missing permission check across all files-related API endpoints. Because authorization is not properly enforced, any authenticated user can list, retrieve, and delete files uploaded by other users on the same platform. In practice, this is a broken access control issue in the files API that permits cross-tenant or cross-user access to file objects that should be restricted to their owners or otherwise authorized principals.
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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 public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Open-WebUI vulnerability associated with file-read style post-exploitation objectives in the observed campaign.
A missing permission check vulnerability in Open WebUI files-related API endpoints that allows any authenticated user to list, access, and delete files uploaded by other users.
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.