CVE-2026-91080: Adnanh Webhook

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

webhook through 2.8.3 reads the entire request body into memory before evaluating trigger rules, allowing unauthenticated attackers to exhaust memory by sending oversized bodies. Attackers can send multi-gigabyte request bodies with invalid signatures to trigger out-of-memory conditions and crash the service.

Affected products

• Adnanh Webhook: up to and including 2.8.3

Published 2026-09-14. Last modified 2026-09-23.