CVE-2026-18736 — Shlink Server-Side Request Forgery via Short URL Title Auto-Resolution
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 cra…
Published: 2026-08-03 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7