Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic chat tree

SummaryChat histories are stored as an unvalidated JSON object. After a message is deleted, the code that picks the chat's new current message walked down the childrenIds links without recording where it had already been. Any account with the default user role could store a chat whose messages li...

Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

SummaryChat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

PYSEC-2026-3879 Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

Summary Chat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

PYSEC-2026-3877 Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic chat tree

Summary Chat histories are stored as an unvalidated JSON object. After a message is deleted, the code that picks the chat's new current message walked down the childrenIds links without recording where it had already been. Any account with the default user role could store a chat whose messages...

chat-with-mlx (>=0.1.0, <=0.1.11), crewai-files (>=1.9.0, <=1.10.1a1) +9 more potentially affected by CVE-2026-84311 via pypdf (4.0.2)

pypdf PYPI version 4.0.2 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - chat-with-mlx =0.1.0, =1.9.0, =3.2.0, =1.2.1, =1.0.9, =0.0.0, =0.1.2, =0.73.0, =0.94.0 Source cves: CVE-2026-84311 Source advisory: OSV:PYSEC-2026-391...

chat-with-mlx (>=0.1.0, <=0.1.11), crewai-files (>=1.9.0, <=1.10.1a1) +9 more potentially affected by CVE-2026-84309 via pypdf (4.0.2)

pypdf PYPI version 4.0.2 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - chat-with-mlx =0.1.0, =1.9.0, =3.2.0, =1.2.1, =1.0.9, =0.0.0, =0.1.2, =0.73.0, =0.94.0 Source cves: CVE-2026-84309 Source advisory: OSV:PYSEC-2026-391...

Xinference vulnerable to remote code execution via unsafe `eval()` in Llama3 tool-call parsing

SummaryXinference used Python's unsafe eval function when parsing Llama3 tool-call output generated by a large language model. Because the model output can be influenced by attacker-controlled prompts sent to the chat completion API, a remote attacker can craft prompts that cause the model to...

PYSEC-2026-3929 Transformers save_pretrained path traversal allows arbitrary file writes through chat template names

A vulnerability in huggingface/transformers versions 5.10.0 allows an attacker to perform arbitrary file writes via path traversal. The issue resides in the savepretrained methods of PreTrainedTokenizerBase and ProcessorMixin, where keys from the chattemplate dictionary are used directly as...

PT-2026-89748

Name of the Vulnerable Software and Affected Versions Sticky Chat Widget versions prior to 1.4.3 Description Unauthenticated attackers can perform SQL Injection through the scw form fields parameter array keys within the scw save form data AJAX action. The issue occurs because the save form data...

PT-2026-89598

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.11.5 Description An unauthenticated attacker can execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints. This occurs because of improper enforcement of...

PT-2026-89431

Name of the Vulnerable Software and Affected Versions Wise Chat versions prior to 3.4.2 Description An issue involving the deserialization of untrusted data allows for Object Injection. Object Injection occurs when untrusted data is used to abuse the logic of a deserialization function, potential...

CVE-2026-81784: Deserialization of Untrusted Data

Deserialization of Untrusted Data vulnerability in Marcin Wise Chat wise-chat allows Object Injection.This issue affects Wise Chat: from n/a through 3.4.2...

EUVD-2026-75185

Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic chat tree...

Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic chat tree

Summary Chat histories are stored as an unvalidated JSON object. After a message is deleted, the code that picks the chat's new current message walked down the childrenIds links without recording where it had already been. Any account with the default user role could store a chat whose messages...

Infinite loop

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Infinite loop through the chat-history message deletion helper process. An attacker can cause the server to hang and deny service to all users by creating a cyclic chat tree and deleting a message, resulting ...

GHSA-3CGP-3CQX-J8W2 Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic chat tree

Summary Chat histories are stored as an unvalidated JSON object. After a message is deleted, the code that picks the chat's new current message walked down the childrenIds links without recording where it had already been. Any account with the default user role could store a chat whose messages...

Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

Summary Chat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

GHSA-JQHH-CJMQ-VMV6 Open WebUI: Any authenticated user can hang the server via a cyclic chat message history

Summary Chat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

EUVD-2026-75188

Open WebUI: Any authenticated user can hang the server via a cyclic chat message history...

CVE-2026-87997

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/openwebui/main.py copied a client-supplied folderid into a new chat without applying the folder write-access chec...