Is CVE-2026-109295 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109295?

CVE-2026-109295 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-109295

Description

Open WebUI from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated users to stall server workers via file search patterns. Attackers can instruct the model to call grep_knowledge_files or grep_chat_files with a catastrophically backtracking regex, blocking the event loop for two seconds per repeated call.