CVE-2026-92760: Shlinkio Shlink

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Shlink through 5.1.6 fails to enforce API key role restrictions when issuing Mercure subscription tokens, allowing restricted keys to subscribe to all topics. Attackers with author-only or domain-only keys can access the mercure-info endpoint to receive visit data including referrer, user agent, geolocation, and full short URL objects for URLs outside their authorization boundary.

Affected products

• Shlinkio Shlink: up to and including 5.1.6

Published 2026-09-16. Last modified 2026-09-23.