Vulnerability · Published May 20, 2026 · Assigned by Fluid Attacks

CVE-2026-7460mailcow-dockerized 2026-03b - Stored XSS in Queue Manager via unescaped

High 7.4

In plain English

A high-severity cross-site scripting in mailcow-dockerized from mailcow. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 4.0)7.4High

Exploit odds (30 days)0.3%top 74.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
mailcow	mailcow-dockerized	2026-03b

Weakness: CWE-79 · 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

References

https://fluidattacks.com/advisories/mojabi third-party-advisory
https://github.com/mailcow/mailcow-dockerized product