{"id":"CVE-2026-92760","title":"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","summary":"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 end…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-863"],"vendor":"shlinkio","product":"shlink","affected":["shlink <= 5.1.6"],"published":"2026-09-16","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:48.213","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92760","references":[{"url":"https://github.com/shlinkio/shlink","label":"disclosure@vulncheck.com"},{"url":"https://github.com/shlinkio/shlink-common/blob/main/src/Mercure/LcobucciJwtProvider.php#L38-L41","label":"disclosure@vulncheck.com"},{"url":"https://github.com/shlinkio/shlink/blob/v5.1.6/module/Rest/src/Action/MercureInfoAction.php#L26-L42","label":"disclosure@vulncheck.com"},{"url":"https://github.com/shlinkio/shlink/issues/2633","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/shlink-through-5.1.6-mercure-token-authorization-bypass","label":"disclosure@vulncheck.com"},{"url":"https://github.com/shlinkio/shlink/issues/2633","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00397,"epssPercentile":0.33794,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T15:00:49.023740Z"},"ingestedAt":"2026-09-16T21:05:36.896Z","slug":"CVE-2026-92760","body":"## Overview\n\nShlink 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":206260,"id":"CVE-2026-92760","ts":1789662164031,"field":"exploit_available","old":"false","new":"true"}]}