Severity: HighAction: Review

In Other News: Anthropic Breach Dispute, UEFI Flaw Hits Most Servers, Cloudflare AI Data Leak

Noteworthy stories that might have slipped under the radar: Iran eyed in military freezer hacks, Copenhagen University breach, AI-powered malware.

Excerpt from the primary source: SecurityWeek

Who is affected

Small businesses · Developers

Affected technology: Claude

What you should do · Review

Review whether your organization uses Claude and assess exposure using the linked advisories.

Automated guidance based on this story's classification. Check the linked advisories for specifics.

Sources

We link to original and authoritative sources. Headlines and excerpts belong to their publishers.

Original reporting

In Other News: Anthropic Breach Dispute, UEFI Flaw Hits Most Servers, Cloudflare AI Data Leak SecurityWeek · securityweek.com · Oct 30, 2026 · Primary source
Severity: ElevatedAction: Be aware

Malicious Claude Code extension on Cursor planted SSH backdoors

A malicious version of Anthropic's Claude Code VS Code extension was distributed through Cursor's extension marketplace for approximately 11 hours on October 29, exposing up to 5,000 developers to malware designed to install persistent SSH backdoors.

Severity: Informational

Shadowy AI Relay Disables OpenAI Codex, Claude Code Sandboxes

The enigmatic service is providing popular AI coding tools to mainland China and other regions where OpenAI and Anthropic products are not officially for sale — but with key security features turned off.