CVE-2026-92760: Incorrect Authorization in shlinkio shlink
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.
AI Analysis
Technical Summary
CVE-2026-92760 describes an incorrect authorization vulnerability in shlink through version 5.1.6. The product fails to enforce API key role restrictions when generating Mercure subscription tokens. As a result, attackers possessing restricted API keys can subscribe to all Mercure topics, including those outside their authorization scope. This unauthorized access enables them to retrieve visit data from the mercure-info endpoint, such as referrer information, user agent strings, geolocation data, and complete short URL objects for URLs they should not have access to.
Potential Impact
Attackers with limited API keys (author-only or domain-only) can bypass intended access controls and obtain sensitive visit data for URLs outside their authorization boundary. This could lead to unauthorized disclosure of user and URL metadata, potentially impacting user privacy and data confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-92760: Incorrect Authorization in shlinkio shlink
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.
CVSS v4.0
Score 7.1high
Affected software
shlinkio
shlink
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92760 describes an incorrect authorization vulnerability in shlink through version 5.1.6. The product fails to enforce API key role restrictions when generating Mercure subscription tokens. As a result, attackers possessing restricted API keys can subscribe to all Mercure topics, including those outside their authorization scope. This unauthorized access enables them to retrieve visit data from the mercure-info endpoint, such as referrer information, user agent strings, geolocation data, and complete short URL objects for URLs they should not have access to.
Potential Impact
Attackers with limited API keys (author-only or domain-only) can bypass intended access controls and obtain sensitive visit data for URLs outside their authorization boundary. This could lead to unauthorized disclosure of user and URL metadata, potentially impacting user privacy and data confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-16T19:06:20.161Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aab005f55bf5e2cf5231df3
Added to database: 09/16/2026, 20:47:27 UTC
Last enriched: 09/16/2026, 22:01:46 UTC
Last updated: 09/17/2026, 02:16:17 UTC
Views: 4
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