Security Advisory

CVE-2026-18736

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-03 20:15:22

Last updated 2026-08-04 13:45:06

Assigner VulnCheck

CVSS score not scored

State PUBLISHED

Description

Shlink contains a server-side request forgery vulnerability that allows authenticated API key holders to cause the server to issue arbitrary HTTP GET requests by supplying a crafted long URL during short URL creation with title auto-resolution enabled. Attackers can submit URLs pointing to public hosts that redirect to internal targets, including loopback addresses, link-local ranges, and cloud metadata endpoints such as 169.254.169.254, to exfiltrate internal service information via the HTML title element returned in the short URL creation response.

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