Detections
Analytics

SCA: security update for github.com/axllent/mailpit (GHSA-w4mc-hhc6-xp28)

medium Tenable Self-Hosted Container Security Plugin ID 443660

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Mailpit is an email testing tool and API for developers. Prior to 1.30.2, the remediation shipped for
 CVE-2026-27808 is incomplete because the tools.IsInternalIP deny-list in internal/tools/net.go relies on
 Go's standard library classification helpers and does not block IPv6 transition mechanisms or prefixes
 such as NAT64, 6to4, IPv4-compatible IPv6, ISATAP, fec0::/10, and 2001:db8::/32. An attacker who can
 deliver email and invoke POST /api/v1/message/{ID}/link-check can coerce the Link Check API's
 safeDialContext path into dialing internal destinations and can use status-code and error feedback to map
 internal service reachability, including cloud metadata endpoints. This issue is fixed in version 1.30.2.
 (CVE-2026-55187)

Solution

Update the github.com/axllent/mailpit library and its related packages to version 1.30.2 or later.

See Also

https://github.com/advisories/GHSA-w4mc-hhc6-xp28

Plugin Details

Severity: Medium

ID: 443660

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 6/20/2026

Updated: 7/13/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-55187

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2026

Vulnerability Publication Date: 6/17/2026

Reference Information

CVE: CVE-2026-55187

cwe: CWE-918