Anthropic VS code extension on Cursor backdoored for nearly 12 hours

What happened

It's still unknown how attackers got access to Anthropic's verified Cursor account.

Why it matters

The financing changes available capital and competitive capacity around Anthropic; terms and investor participation remain key.

Affected entities

View evidence

2 reports · 1 original report · 2 independent

1. Ars Technica AIPrimary source · Supports · EN · 100%
   Anthropic VS code extension on Cursor backdoored for nearly 12 hours ↗Oct 30, 2026, 5:09 PM
2. TechCrunch AIIndependent · Supports · EN · 48%
   Anthropic expected to receive high ‘junk’ rating from credit agencies following IPO, FT report says ↗Oct 30, 2026, 5:52 PM

Claims

• Anthropic VS code extension on Cursor backdoored for nearly 12 hours Observed

Conflicts

No material conflict detected in the available evidence.

Timeline

1. October 30, 2026 at 5:09 PMFirst reported
2. Oct 30, 2026, 5:52 PMUnverified · 62/66%
3. Oct 30, 2026, 6:20 PMCorroborated · 62/72%

Market move following event

Market reaction is not yet available for this asset and time window.

Score explanation