CVE-2026-71271: Usememos Memos

High severity, CVSS 8.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.

Affected products

• Usememos Memos: up to and including 0.29.1

Published 2026-08-05. Last modified 2026-08-26.