CVE-2026-62143

The CVE-2026-62143 issue affects the html_to_markdown expansion module of misp-modules. An SSRF protection bypass occurred because IPv4-mapped IPv6 addresses were not normalised before checking blocked IP ranges, allowing an authenticated attacker to supply addresses like http://[::ffff:127.0.0.1...

CVE-2026-62143 Server-Side Request Forgery protection bypass in misp-modules html_to_markdown via IPv4-mapped IPv6 addresses

A Server-Side Request Forgery SSRF protection bypass existed in the htmltomarkdown expansion module of misp-modules. The module attempts to prevent requests to loopback, private, link-local, and other restricted IP address ranges. However, IP addresses were compared against the blocked ranges...