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-2026-108676

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...

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-2026-108033

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-2026-108032

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-2026-108045

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-2026-108677

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...

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...

CVE-2026-15619

CVE-2026-15619 affects mosaxiv clawlet prior to 0.2.10. The vulnerable element is the web_fetch function in tools/tool_web_fetch.go of the IPv4 Handler. The issue arises from manipulating the url argument, enabling server-side request forgery (SSRF). The attack can be initiated remotely, and an e...

PT-2026-57933

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

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the WebFetchTool.Execute function in the Guarded Web Fetch Flow process. An attacker can make the server initiate arbitrary HTTP requests to internal or external resources by supplying crafted URLs...

CVE-2026-15317

A security flaw has been discovered in Sipeed PicoClaw up to 0.2.9. Affected by this vulnerability is the function WebFetchTool.Execute of the file pkg/tools/integration/web.go of the component Guarded Web Fetch Flow. The manipulation results in server-side request forgery. The attack can be...

CVE-2026-15317

A security flaw has been discovered in Sipeed PicoClaw up to 0.2.9. Affected by this vulnerability is the function WebFetchTool.Execute of the file pkg/tools/integration/web.go of the component Guarded Web Fetch Flow. The manipulation results in server-side request forgery. The attack can be...

CVE-2026-15317

Sipeed PicoClaw

PT-2026-57020

A security flaw has been discovered in Sipeed PicoClaw up to 0.2.9. Affected by this vulnerability is the function WebFetchTool.Execute of the file pkg/tools/integration/web.go of the component Guarded Web Fetch Flow. The manipulation results in server-side request forgery. The attack can be...

Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch

Because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain—including attacker-controlled model repositories—was auto-approved without a permission prompt or being subject to --allowedTools restrictions. An attacker able to inject untrust...

CVE-2026-49138

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...