EUVD-2026-97600

Open WebUI 0.11.0 before 0.11.4 compiles user-chosen grep patterns for its knowledge and chat file search tools with a regex engine that expands nested counted repetition unbounded at compile time and caches the result. Authenticated users can have the model call grepknowledgefiles with short...

CVE-2026-109297

The Open WebUI application versions 0.11.0 before 0.11.4 are vulnerable to a Denial of Service (DoS) attack via the automation recurrence-rule validator . The root cause is a discrepancy where the sub-daily frequency guard parses rule text more strictly than the underlying calendar library used f...

EUVD-2026-97599

Open WebUI 0.11.0 before 0.11.4 contains a denial of service vulnerability in the automation recurrence-rule validator, whose sub-daily frequency guard parses rule text more strictly than the calendar library that executes it. Users permitted to create automations can submit whitespace-folded rul...

CVE-2026-109298 Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex

Open WebUI 0.11.0 before 0.11.4 compiles user-chosen grep patterns for its knowledge and chat file search tools with a regex engine that expands nested counted repetition unbounded at compile time and caches the result. Authenticated users can have the model call grepknowledgefiles with short...

CVE-2026-109298

The Open WebUI software (versions 0.11.0 before 0.11.4) is vulnerable to memory exhaustion due to how it handles user-chosen grep patterns in its knowledge and chat file search tools. The underlying cause is a regex engine that expands nested counted repetitions unbounded at compile time and cach...

EUVD-2026-97598

Open WebUI before 0.11.4 contains a missing authorization vulnerability that allows authenticated users to reach disabled model provider backends by supplying an explicit backend index. Attackers can pass the index as a path segment or query parameter on Ollama and OpenAI-compatible listing route...

CVE-2026-109296

Open WebUI versions prior to 0.11.4 are vulnerable to a missing authorization flaw (CWE-639) in the model routes. This vulnerability allows authenticated users to access disabled model provider backends by providing an explicit backend index as a path segment or query parameter on Ollama and Open...

EUVD-2026-97597

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 grepknowledgefiles or grepchatfiles with a catastrophically backtracking...

CVE-2026-109295

The Open WebUI software (versions 0.11.0 before 0.11.4 ) is vulnerable to a Regular Expression Denial of Service (ReDoS) . The root cause is inefficient regular expression complexity (CWE-1333) within the grep_knowledge_files or grep_chat_files functions. Authenticated users can exploit this by i...

EUVD-2026-97596

Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by supplying compressed remote image URLs in chat messages. Attackers can point the image field at a host returning gzip-encoded responses, whi...

CVE-2026-109295 Open WebUI 0.11.0 before 0.11.4 ReDoS via grep_knowledge_files Event Loop

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 grepknowledgefiles or grepchatfiles with a catastrophically backtracking...

CVE-2026-109294 Open WebUI 0.6.42 before 0.11.4 Memory Exhaustion via Compressed Remote Image

Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by supplying compressed remote image URLs in chat messages. Attackers can point the image field at a host returning gzip-encoded responses, whi...

CVE-2026-109294

Open WebUI versions 0.6.42 before 0.11.4 are vulnerable to an uncontrolled resource consumption vulnerability (CWE-400). Authenticated users can trigger a denial of service for all users by providing compressed remote image URLs in chat messages. The flaw exists in the get_image_base64_from_url f...

EUVD-2026-97595

Open WebUI from 0.11.0 before 0.11.4 contains an information disclosure vulnerability that allows authenticated non-admin users with tool export permission to obtain tool source code shared with them read-only. Attackers can request GET /api/v1/tools/export to retrieve the full Python source of...

CVE-2026-109293 Open WebUI 0.11.0 before 0.11.4 Tool Source Disclosure via Tool Export Endpoint

Open WebUI from 0.11.0 before 0.11.4 contains an information disclosure vulnerability that allows authenticated non-admin users with tool export permission to obtain tool source code shared with them read-only. Attackers can request GET /api/v1/tools/export to retrieve the full Python source of...

CVE-2026-109293

Open WebUI versions 0.11.0 through 0.11.3 are vulnerable to an information disclosure flaw via the Tool Export Endpoint . Authenticated non-admin users with tool export permissions can use a GET request to /api/v1/tools/export to retrieve the full Python source code of read-only shared tools. Thi...

EUVD-2026-97593

Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embedurl fields. Attackers can share a crafted chat whose citation, when clicked, is passed to...

EUVD-2026-97594

Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal...

CVE-2026-109291

Open WebUI versions 0.6.33 before 0.11.4 are vulnerable to a Stored Cross-Site Scripting (XSS) flaw. The root cause is the failure to properly neutralize input, allowing authenticated users to store javascript: URLs within citation embed_url fields. An attacker can share a crafted chat where clic...

CVE-2026-109292

The Open WebUI software (versions 0.6.27 before 0.11.4 ) is vulnerable to an information disclosure flaw. During OAuth-mode connections , the application may send the full browser cookie jar to destination servers. This allows operators of OpenAI-compatible connections , OpenAPI tool servers , or...