CVE-2026-92760 Shlink through 5.1.6 Mercure Token Authorization Bypass
Attackers with restricted API keys can bypass authorization to access sensitive visit data for URLs outside their permitted scope.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92760?
CVE-2026-92760 is a high-severity missing authorization vulnerability in shlinkio shlink, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-92760?
How do I fix CVE-2026-92760?
No fix has been published for CVE-2026-92760 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-92760 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92760 exists.
Sources
Also known as GHSA-r72g-8wq6-6m7w.