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CVE-2026-56723

Zammad: Missing authorization on ticket attachment download

HIGH
7.1
CVSS Score
Published: September 25, 2026 at 04:48 PM UTC
Updated: September 28, 2026 at 02:45 PM UTC
1 product affected across 1 vendorZammad

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Severity
HIGH7.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zammad· Zammad
60%
v < 7.0.2
Affected range stops below 7.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-863

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