CVE-2026-92760CWE-863broken-access-control

CVE-2026-92760

Medium · published September 17, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
34.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00415 · 34.7th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-17T01:17Z
References (6)
https://github.com/shlinkio/shlink · [email protected]https://github.com/shlinkio/shlink-common/blob/main/src/Mercure/LcobucciJwtProvider.php#L38-L41 · [email protected]https://github.com/shlinkio/shlink/blob/v5.1.6/module/Rest/src/Action/MercureInfoAction.php#L26-L42 · [email protected]https://github.com/shlinkio/shlink/issues/2633 · [email protected]https://www.vulncheck.com/advisories/shlink-through-5.1.6-mercure-token-authorization-bypass · [email protected]https://github.com/shlinkio/shlink/issues/2633 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 SEP 04:02Z
    EPSS moved — → 0%
    epss
  • 16 SEP 20:32Z
    Shlink through 5.1.6 Mercure Token Authorization Bypass
    cvelistv5