CVE-2026-73629 — Serendipity before 2.6.0 SSRF via hex IPv4 and IPv6 addresses
Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 litera…
Published: 2026-08-13 · CVSS: 8.4 · CVSS 4.0
Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 literals, and link-local ranges. Authenticated users with adminImagesAdd permission can bypass the filter using alternate address formats to request internal services and retrieve response bodies through the public uploads directory.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7