CVE-2026-92760: shlinkio shlink · Incorrect Authorization
Affects shlinkio shlinkSource CVE Database V5
Not known to be exploited · CVSS 7.1 High.
Data as of 31 Oct 2026, 20:20 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 35% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 16 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| shlinkioshlink | Affected
| Fixed in– |
GitHubshlinkio/shlinkpkg:github/shlinkio/shlinkOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until an official fix is available, restrict API key distribution and monitor for unauthorized access attempts. Avoid using author-only or domain-only keys in untrusted environments.
Description
Shlink versions up to 5.1.6 have an authorization flaw where API key role restrictions are not properly enforced when issuing Mercure subscription tokens. This allows restricted API keys, such as author-only or domain-only keys, to subscribe to all topics and access visit data beyond their intended scope. The exposed data includes referrer, user agent, geolocation, and full short URL objects for URLs outside the authorized boundary.
References
- github.com/shlinkio/shlink/issues/2633 (opens in a new tab)
- github.com/shlinkio/shlink (opens in a new tab)
- github.com/shlinkio/shlink/blob/v5.1.6/module/Rest/src/Action/MercureInfoAction.php (opens in a new tab)
- github.com/shlinkio/shlink-common/blob/main/src/Mercure/LcobucciJwtProvider.php (opens in a new tab)
- vulncheck.com/advisories/shlink-through-5.1.6-mercure-token-authorization-bypass (opens in a new tab)