TI-2026-26543 Aliases CVE-2026-34248

Zammad has an information disclosure in ticket detail view of customers in shared organizations

LOW 11CWE-284Published 2026-04-08 · Updated 2026-04-09

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: Present
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00201 10th percentileScored 2026-11-07

Fix Fixed zammad (zammad): 7.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Zammad GmbH	zammad	7.0.0 to before 7.0.1	7.0.1	Patch available	CNA

zammad VendorZammad GmbH Affected 7.0.0 to before 7.0.1 Fixed in 7.0.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:zammad:zammad:7.0.0:::::::*	7.0.0	Vulnerable	Zammad GmbH

cpe:2.3:a:zammad:zammad:7.0.0:*:*:*:*:*:*:* Versions 7.0.0 Vulnerable ·Zammad GmbH

Remediation

Fix · CNA zammad (zammad) Fixed in 7.0.1

Timeline

2026-10-02 Threatist record created from CVE-2026-34248

References

Advisory 1

https://github.com/zammad/zammad/security/advisories/GHSA-prww-84vh-w978

TI-2026-65406 Local privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package KEVCVSS 4.0CRITICAL 9.4
TI-2026-65405 Undisclosed RCE in Zammad v6.3 and higher KEVCVSS 4.0CRITICAL 9.4
TI-2024-22252 An issue was discovered in Zammad before 6.3.0. CVSS 3.1CRITICAL 9.1
TI-2022-23785 A vulnerability in Zammad v5.3.0 allows attackers to execute arbitrary code or escalate… CVSS 3.1CRITICAL 9.8
TI-2021-18599 An issue was discovered in Zammad before 4.1.1. CVSS 3.1CRITICAL 9.8
TI-2021-18603 An issue was discovered in Zammad before 4.1.1. CVSS 3.1CRITICAL 9.8

See all 91 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences