FreeBSD : mail/mailpit -- Incomplete SSRF protection in Link Check API via uncovered IPv6 forms (44afeb08-6a18-11f1-9647-10ffe07f9334)

critical Nessus Plugin ID 321373

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 44afeb08-6a18-11f1-9647-10ffe07f9334 advisory.

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

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 321373

File Name: freebsd_pkg_44afeb086a1811f1964710ffe07f9334.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 6/17/2026

Updated: 6/17/2026

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-55187

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:mailpit

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 6/17/2026

Vulnerability Publication Date: 6/17/2026

Reference Information

CVE: CVE-2026-55187

Detections

Analytics