CVE-2026-72587: Corebunch Instatic

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/<nodeId> server island endpoint.

Affected products

• Corebunch Instatic: up to and including 0.0.14

Published 2026-08-10. Last modified 2026-08-28.