CVE-2026-7460 PUBLISHED

mailcow-dockerized 2026-03b - Stored XSS in Queue Manager via unescaped

Assigner: Fluid Attacks
Reserved: 29.04.2026 Published: 20.05.2026 Updated: 20.05.2026

mailcow-dockerized contains a stored cross-site scripting vulnerability in the administrator Queue Manager. The Queue Manager fetches mail queue entries from /api/v1/get/mailq/all, copies server-controlled Postfix queue fields into DataTables rows, and renders several of those fields as HTML without adequate output encoding.

This issue affects mailcow-dockerized: 2026-03b.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
CVSS Score: 7.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	Low	Integrity	High	Integrity	Low
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	mailcow
Product	mailcow-dockerized
Versions	Default: unaffected Version 2026-03b is affected

Credits

Fluid Attacks' AI SAST Scanner finder
Oscar Naveda finder

References

Problem Types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE

Impacts

CAPEC-592 Stored XSS