CVE-2026-56299: Capgo

Medium severity, CVSS 5.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Capgo before 12.128.2 contains an authentication bypass vulnerability in the /build/upload/:jobId/* endpoint that allows unauthenticated attackers to trigger consistent 500 errors. Remote attackers can send OPTIONS requests to bypass authentication middleware and invoke tusProxy logic with invalid credentials, enabling trivial request flooding and denial of service.

Affected products

• Capgo Capgo: before 12.128.2 (fixed in 12.128.2)

Published 2026-06-21. Last modified 2026-06-23.