mail/mailpit -- Incomplete SSRF protection in Link Check API via uncovered IPv6 forms

2026-06-17 · CVE-2026-55187 · VuXML entry

Mailpit authorreports: The tools.IsInternalIP deny-list relies on Go's stdlib classification helpers (IsLoopback, IsPrivate, IsLinkLocalUnicast, IsLinkLocalMulticast, IsUnspecified, IsMulticast) plus an inline CGNAT range, but those helpers do not match two classes of IPv6 address that should be blocked for SSRF purposes

Affected versions

• mailpit < 1.30.2

By system

0 still vulnerable, 1 fixed. Where VuXML applies (FreeBSD, DragonFly, FreeBSD's derivatives) a port is vulnerable while its version is in a range; pkgsrc says itself whether it lists a CVE of this advisory; OpenBSD and MidnightBSD keep no list this site reads, so their row is only an estimate: FreeBSD's ranges applied to upstream's version.