CVE-2026-44313: Ssrf Scheme Only Url Guard Before Server Fetch
A URL is passed to fetch() after only a scheme-prefix check (startsWith("http://") or startsWith("https://")). RFC-1918 addresses, loopback (127.0.0.1), link-local (169.254.x.x), and cloud metadata endpoints all satisfy a scheme-only guard, enabling Server-Side Request Forgery. Resolve the URL hostname to an IP address and validate it against a blocklist of
TSgreprules fetch cve-2026-44313-ssrf-scheme-only-url-guard-before-server-fetch --engine opengrepDescription
A URL is passed to fetch() after only a scheme-prefix check (startsWith("http://") or startsWith("https://")). RFC-1918 addresses, loopback (127.0.0.1), link-local (169.254.x.x), and cloud metadata endpoints all satisfy a scheme-only guard, enabling Server-Side Request Forgery. Resolve the URL hostname to an IP address and validate it against a blocklist of
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