CVE-2026-40280

Gotenberg vulnerability (CVE-2026-40280) enables SSRF through a case-insensitive URL scheme bypass in the webhook and api-download-from deny-lists. In versions

CVE-2026-40280: Server-Side Request Forgery (SSRF)

Gotenberg is an API-based document conversion tool. In versions 8.30.1 and earlier, the default private-IP deny-lists for the --webhook-deny-list and --api-download-from-deny-list flags use a case-sensitive regular expression ^https?:// to match URL schemes. Because Go's net/url.Parse normalizes...

GHSA-5Q7P-7JGV-WW56 Gotenberg has case-insensitive URL scheme that bypasses webhook and downloadFrom deny-list SSRF protection

Vulnerability Details CWE: CWE-918 - Server-Side Request Forgery SSRF The default private-IP deny-lists for --webhook-deny-list and --api-download-from-deny-list use a case-sensitive regex ^https?://. Any uppercase URL scheme variant HTTP://, HTTPS://, Http:// bypasses the pattern. Go's...