CVE-2026-18736

mediumCVSS 5covered by 1 sourcefirst seen 2026-08-03

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.

⚡ Watch CVE-2026-18736

Get an email if CVE-2026-18736 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Advisory coverage (1)

mediumCVE-2026-18736: Shlink contains a server-side request forgery vulnerability that allows authenticated API key …nvd · 2026-08-03

External references

NVD record for CVE-2026-18736

CVE.org record

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2026-18736 status](https://www.csirts.com/badge/CVE-2026-18736)](https://www.csirts.com/cve/CVE-2026-18736)