CVE-2026-109298

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-2026-109295

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-2026-109298 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

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 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...

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-2026-109298 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...

CVE-2026-109295

Open WebUI versions 0.11.0 through 0.11.3 are vulnerable to a Regular Expression Denial of Service (ReDoS) flaw. An authenticated user can exploit this by instructing the model to execute the grep_knowledge_files or grep_chat_files functions using a catastrophically backtracking regex . This acti...

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...

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 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-2026-109295 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-2026-109295

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: Inefficient Regular Expression Complexity

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-2026-109298: Uncontrolled Resource Consumption

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...

Regular Expression Denial of Service (ReDoS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the grepknowledgefiles process. An attacker can exhaust CPU resources and prevent other users from accessing the affected worker by submitting a specially crafte...