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Vulnerability record · CVE-2026-56731 · published 25 September 2026

CVE-2026-56731: Cross-site scripting vulnerability

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a low-privilege authenticated user may inject arbitrary HTML markup, including JavaScript event handlers, into a ticket title via the standard ticket creation workflow. The title is persisted without sanitization. This issue is fixed in version 7.0.1.

8.4 CVSS 4.0 High EPSS 0.24% · top 86.1% CWE-79 · Cross-site scripting Received
8.4CVSS 4.0 base score
0.24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
25 Sep 2026Last modified by NVD

Description

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a low-privilege authenticated user may inject arbitrary HTML markup, including JavaScript event handlers, into a ticket title via the standard ticket creation workflow. The title is persisted without sanitization. This issue is fixed in version 7.0.1.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/zammad/zammad/commit/16a4a2e1be6642ec0c3ba3a76e358ad065f48f78
https://github.com/zammad/zammad/security/advisories/GHSA-p9xp-gx8r-4397

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Source: NIST National Vulnerability Database (record CVE-2026-56731), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.