Open WebUI Prompt history IDOR: unbound history_id allows cross-prompt read and deletion

SummaryOpen WebUI's prompt version-history endpoints authorize the promptid in the URL but then act on caller-supplied history IDs without verifying that the history row belongs to that prompt historyentry.promptid == prompt.id. Three operations are affected:- GET...

Open WebUI: Cross-origin postMessage confirmation bypass via action:submit

SummaryThe chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorize...

PYSEC-2026-2701 Open WebUI Prompt history IDOR: unbound history_id allows cross-prompt read and deletion

Summary Open WebUI's prompt version-history endpoints authorize the promptid in the URL but then act on caller-supplied history IDs without verifying that the history row belongs to that prompt historyentry.promptid == prompt.id. Three operations are affected: - GET...

PraisonAI CLI automatically resolves @url mentions in prompt text and can read loopback URLs into model context

SummaryPraisonAI's direct-prompt CLI automatically expands @url: mentions in raw prompt text before agent execution begins.If a prompt contains @url:, the CLI calls MentionsParser.process.... The @url: handler then performs a direct urllib.request.urlopen request to the attacker-controlled URL an...

PraisonAI CLI automatically resolves @url mentions in prompt text and can read loopback URLs into model context

SummaryPraisonAI's direct-prompt CLI automatically expands @url: mentions in raw prompt text before agent execution begins.If a prompt contains @url:, the CLI calls MentionsParser.process.... The @url: handler then performs a direct urllib.request.urlopen request to the attacker-controlled URL an...

PYSEC-2026-2903 PraisonAI CLI automatically resolves @url mentions in prompt text and can read loopback URLs into model context

Summary PraisonAI's direct-prompt CLI automatically expands @url: mentions in raw prompt text before agent execution begins. If a prompt contains @url:, the CLI calls MentionsParser.process.... The @url: handler then performs a direct urllib.request.urlopen request to the attacker-controlled URL...

PYSEC-2026-2942 PraisonAI CLI automatically resolves @url mentions in prompt text and can read loopback URLs into model context

Summary PraisonAI's direct-prompt CLI automatically expands @url: mentions in raw prompt text before agent execution begins. If a prompt contains @url:, the CLI calls MentionsParser.process.... The @url: handler then performs a direct urllib.request.urlopen request to the attacker-controlled URL...

hermes-agent has an Injection issue

A vulnerability was found in NousResearch hermes-agent 2026.4.23. The impacted element is the function scancontextcontent of the file agent/promptbuilder.py. The manipulation results in injection. The attack may be performed from remote. The exploit has been made public and could be used. The...

PYSEC-2026-2514 hermes-agent has an Injection issue

A vulnerability was found in NousResearch hermes-agent 2026.4.23. The impacted element is the function scancontextcontent of the file agent/promptbuilder.py. The manipulation results in injection. The attack may be performed from remote. The exploit has been made public and could be used. The...

PYSEC-2026-2509 hermes-agent has an Injection issue

A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skillsguard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREATPATTERNS leads to injection. Remote exploitatio...

Open WebUI: Sharing models for others to use (read permission) also exposes model details (system prompt leakage)

SummaryWhen setting model permissions so that a group has read access to it, intending for other users to use it, those users also can read the model's system prompt.However users may consider their system prompt confidential, so we consider this a security issue.Compare...

Open WebUI Exposes System Prompt to Regular User [Non-Admin]

SummaryA regular user non-admin can view the system prompt of the model which is set by an admin. DetailsWhen a regular user non-admin logs into the application, a http://IP:8080/api/models? web request is initiated by the application and in response, it reveals the system prompt of available...

PYSEC-2026-2728 Open WebUI: Sharing models for others to use (read permission) also exposes model details (system prompt leakage)

Summary When setting model permissions so that a group has read access to it, intending for other users to use it, those users also can read the model's system prompt. However users may consider their system prompt confidential, so we consider this a security issue. Compare...

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

DescriptionThe LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

DescriptionThe LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

DescriptionThe LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

MLflow allows an unauthenticated remote attacker to read arbitrary files from the server's filesystem

A vulnerability in the createmodelversion handler of mlflow/server/handlers.py in mlflow/mlflow versions 3.9.0 and earlier allows an unauthenticated remote attacker to read arbitrary files from the server's filesystem. The issue arises when a CreateModelVersion request includes the tag...

mcpo-simple-server has a Path Traversal issue

A weakness has been identified in getsimpletool mcpo-simple-server up to 0.2.0. Affected is the function deletesharedprompt of the file src/mcposimpleserver/services/promptmanager/basemanager.py. This manipulation of the argument detail causes relative path traversal. It is possible to initiate t...

PYSEC-2026-2632 mcpo-simple-server has a Path Traversal issue

A weakness has been identified in getsimpletool mcpo-simple-server up to 0.2.0. Affected is the function deletesharedprompt of the file src/mcposimpleserver/services/promptmanager/basemanager.py. This manipulation of the argument detail causes relative path traversal. It is possible to initiate t...

LangChain has incomplete f-string validation in prompt templates

LangChain's f-string prompt-template validation was incomplete in two respects.First, some prompt template classes accepted f-string templates and formatted them without enforcing the same attribute-access validation as PromptTemplate. In particular, DictPromptTemplate and ImagePromptTemplate cou...