AI Sec Watch: A Security Intelligence Platform for AI Systems

Luu, T.J.

llm-anthropic 0.27

infonewsLLM-Specific

industry

Source: Simon Willison's WeblogAugust 24, 2026

Summary

The llm-anthropic 0.27 release updates the Anthropic plugin to work with the newly released anthropic v1.0.0 Python library, which switches its underlying HTTP client from httpx to httpx2 (a newer version of the HTTP request library). This follows a similar update made by OpenAI in their v3.0.0 release two weeks earlier.

Solution / Mitigation

Anthropic provides a migration guide for upgrading to version 1.0, available at https://raw.githubusercontent.com/anthropics/anthropic-sdk-python/refs/heads/main/MIGRATION.md. Users should upgrade to anthropic>=1 and ensure tests pass after the migration.

Classification

Attack SophisticationTrivial

AI Component TargetedAPI

Affected Vendors

Anthropic

Related Issues

info

Secure AI agent access patterns to AWS resources using Model Context Protocol

Same vendorAWS Security Blog

high

Anthropic accuses Chinese AI labs of mining Claude as US debates AI chip exports

Same vendorTechCrunch

Monthly digest — independent AI security research

Original source: https://simonwillison.net/2026/Aug/24/llm-anthropic/

First tracked: August 24, 2026 at 08:01 PM

Classified by LLM (prompt v3) · confidence: 85%