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CVE-2026-18736

Shlink Server-Side Request Forgery via Short URL Title Auto-Resolution PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
shlinkio / Shlinkaffected 2.6.0 through 5.1.5

CWE

CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.