Vulnerability in Zammad

CVE-2026-34248

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, customers in shared organizations (means they can see each other's tickets) could see fields which are not intended for customers - including fields not intended for them at all (e.g. priority, custom ticket attributes for internal purposes). This was the case when a customer opened a ticket from another user of the same shared organization. They are not able to modify these field. This vulnerability is fixed in 7.0.1.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.1% 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-2026-34248: 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-2026-34248?
CVE-2026-34248 is a medium-severity vulnerability in Zammad, classified under Improper Access Control. CVSS score: 5.7/10. Published 2026-04-08.
How severe is CVE-2026-34248?
Medium severity. CVSS v3 base score is 5.7 out of 10.