medium6.5
CVE-2026-92760
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.
Impact
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
| Product | Affected versions |
|---|---|
| Shlink | through 5.1.6 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/shlinkio/shlink
- https://github.com/shlinkio/shlink-common/blob/main/src/Mercure/LcobucciJwtProvider.php#L38-L41
- https://github.com/shlinkio/shlink/blob/v5.1.6/module/Rest/src/Action/MercureInfoAction.php#L26-L42
- https://github.com/shlinkio/shlink/issues/2633
- https://www.vulncheck.com/advisories/shlink-through-5.1.6-mercure-token-authorization-bypass
- https://github.com/shlinkio/shlink/issues/2633