Is there a patch available for CVE-2026-34248?

Yes, a patch is available for CVE-2026-34248. Update the affected software to the latest version immediately.

Zammad CVE-2026-34248

Q: What is the CVSS score of CVE-2026-34248?

CVE-2026-34248 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:N/VA:N/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:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-20556 LOW

Improper Access Control (CWE-284)

2026-04-08 GitHub_M

Authentication Bypass Zammad

2.1

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:N/VA:N/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:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:N/VA:N/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:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Scope

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

7.0.1

EUVD ID Assigned

Apr 08, 2026 - 19:31 euvd

EUVD-2026-20556

Analysis Generated

Apr 08, 2026 - 19:31 vuln.today

CVE Published

Apr 08, 2026 - 18:00 nvd

LOW 2.1

DescriptionGitHub Advisory

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.

AnalysisAI

Zammad prior to 7.0.1 improperly discloses internal ticket fields to customers within shared organizations, allowing them to view restricted fields such as priority and custom internal attributes when accessing tickets from other organization members. This information disclosure vulnerability requires customer-level authentication and user interaction to exploit, and has a very low CVSS score of 2.1 reflecting minimal confidentiality impact with no ability to modify exposed data.

Technical ContextAI

Zammad is a web-based helpdesk system that organizes customers into shared organizations where members can view each other's tickets. The vulnerability stems from inadequate field-level access control (CWE-284: Improper Access Control) in the ticket viewing functionality. When customers open tickets created by other organization members, the application fails to properly filter sensitive fields before rendering them in the user interface. This affects the field visibility logic that should restrict customers from seeing internal attributes like priority levels and custom ticket fields marked for internal use only. The issue is specific to the shared organization feature where multiple customers are assigned to the same organization entity.

RemediationAI

Upgrade Zammad to version 7.0.1 or later, which implements proper field-level access control to prevent customers from viewing internal ticket attributes. The fix restricts visibility of sensitive fields such as priority and custom internal attributes to customers accessing tickets from other organization members. Administrators should prioritize this update for any Zammad installations supporting shared organizations with customer access. The vendor security advisory at https://github.com/zammad/zammad/security/advisories/GHSA-prww-84vh-w978 provides additional implementation guidance.