Auth bypass in Zammad

CVE-2026-34782

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the REST endpoint POST /api/v1/ai_assistance/text_tools/:id was not checking if a user is privileged to use the text tool, resulting in being able to use it in all situations. This vulnerability is fixed in 7.0.1 and 6.5.4.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-34782: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Zammad — versions 7.0.0, >= 7.0.0, < 7.0.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-34782?
CVE-2026-34782 is a medium-severity vulnerability in Zammad, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-04-08.
How severe is CVE-2026-34782?
Medium severity. CVSS v3 base score is 4.3 out of 10.