Anthropic Cuts Live Internet Access for Internal AI Tests After Claude Exploits Injection Flaws

Anthropic on Friday said it's cutting off live internet access for all its internal evaluations until further notice following the discovery of new incidents in which its artificial intelligence AI models exhibited misaligned behavior and targeted real websites. The AI company said it identified...

PT-2026-108045

Name of the Vulnerable Software and Affected Versions Pydantic AI versions 1.77.0 through 1.107.5 Pydantic AI versions prior to 2.44.0 Description The local web fetch tool and the WebFetch local fallback process server-controlled responses using operations that grow quadratically relative to the...

PT-2026-108033

Name of the Vulnerable Software and Affected Versions Pydantic AI versions 1.77.0 through 1.107.5 Pydantic AI versions prior to 2.44.0 Description The local web fetch tool and the WebFetch local fallback compare blocked domains entries with a URL hostname before both values are normalized to the...

PT-2026-108054

Name of the Vulnerable Software and Affected Versions Pydantic AI versions 1.77.0 through 1.107.1 Pydantic AI versions prior to 2.24.0 Description Certain remote-content download paths buffer the entire HTTP response body into memory before enforcing content-size controls. This occurs when using...

PT-2026-108032

Name of the Vulnerable Software and Affected Versions Pydantic AI versions 1.77.0 through 1.107.6 Pydantic AI versions prior to 2.52.0 Description The local web fetch tool and the WebFetch local fallback can consume excessive CPU and memory during the conversion of HTML to Markdown. This occurs...

PT-2026-108654

Summary The local web-fetch tool web fetch tool, also used as the WebFetch capability's local fallback processed responses with several steps whose running time grows quadratically with the size of certain server-controlled inputs, and ran them on the event loop: decoding the body with whichever...

PT-2026-108677

Summary Applications using Pydantic AI's local web-fetch tool can experience excessive CPU and memory use when it converts attacker-controlled HTML. An agent must fetch the affected page; provider-native web fetching is not affected. Details Nested block elements cause HTML-to-Markdown conversion...

PT-2026-108676

Summary Several remote-content download paths in Pydantic AI buffered the entire HTTP response body into memory before enforcing any size limit. An application that exposes the local web-fetch tool web fetch tool, or the WebFetch capability's local fallback to untrusted prompts can be driven to...

CVE-2026-104120

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetchurl of the file mcpserverfetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request...

CVE-2026-104120 modelcontextprotocol mcp-server-fetch/mcp-server-everything Fetch Tool server.py fetch_url server-side request forgery

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetchurl of the file mcpserverfetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request...

CVE-2026-104120

A server-side request forgery (SSRF) vulnerability exists in the modelcontextprotocol components mcp-server-fetch and mcp-server-everything up to version 2026.6.4 . The flaw is located in the fetch_url function within the file mcp_server_fetch/server.py of the Fetch Tool component. An attacker ca...

CVE-2026-104120 modelcontextprotocol mcp-server-fetch/mcp-server-everything Fetch Tool server.py fetch_url server-side request forgery

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetchurl of the file mcpserverfetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request...

EUVD-2026-91161

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetchurl of the file mcpserverfetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request...

CVE-2026-104120

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetchurl of the file mcpserverfetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request...

CVE-2026-104120: Server-Side Request Forgery (SSRF)

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetchurl of the file mcpserverfetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request...

PT-2026-104071

Name of the Vulnerable Software and Affected Versions mcp-server-fetch versions prior to 2026.6.4 mcp-server-everything versions prior to 2026.6.4 Description A server-side request forgery SSRF issue exists in the Fetch Tool component. The vulnerability occurs within the fetch url function locate...

PYSEC-2026-3580 Nanobot contains a server-side request forgery vulnerability in the web_fetch tool

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the webfetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the...

CVE-2026-15620

A security vulnerability has been detected in mosaxiv clawlet up to 0.2.10. This affects the function tools.webFetch of the file tools/toolwebfetch.go. Such manipulation leads to server-side request forgery. The attack can be launched remotely. The exploit has been disclosed publicly and may be...

EUVD-2026-43582

A security vulnerability has been detected in mosaxiv clawlet up to 0.2.10. This affects the function tools.webFetch of the file tools/toolwebfetch.go. Such manipulation leads to server-side request forgery. The attack can be launched remotely. The exploit has been disclosed publicly and may be...

CVE-2026-15619 mosaxiv clawlet IPv4 tool_web_fetch.go web_fetch server-side request forgery

A weakness has been identified in mosaxiv clawlet up to 0.2.10. The impacted element is the function webfetch of the file tools/toolwebfetch.go of the component IPv4 Handler. This manipulation of the argument url causes server-side request forgery. The attack can be initiated remotely. The exploi...