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2.1

Zammad agents can view restricted knowledge‑base answers

CVE-2026-56730 · published 24 days ago
Summary

In Zammad versions before 7.0.2, a help‑desk agent who is logged in could see knowledge‑base answers they were not supposed to access. The system failed to check the agent’s permission for those answers when preparing a suggestion for a ticket. Updating to version 7.0.2 removes this gap and restores proper access control.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
zammad zammad < 7.0.2
Original advisory text
Zammad: Missing authorization in GraphQL mutation for suggesting knowledge base answers
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, an authorization bypass vulnerability was found that allows an authenticated agent to read knowledge base answer content they should not be able to access. The vulnerable GraphQL mutation is meant to transform a knowledge base answer suggestion so it can be inserted into the ticket editor, but it only checks if the user has the ticket.agent permission. Checking the authorization to the knowledge base answer itself is missing. This vulnerability is fixed in 7.0.2.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
2.1 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-862Missing Authorization
Timeline
Published25 Sep 2026
Updated19 Oct 2026
First seen25 Sep 2026
Sources
CVE-2026-56730 · NVD
CVE-2026-56730 · MITRE
CVE-2026-56730 · OSV
GHSA-pf47-8964-pp23 · GHSA
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