Low severity · published Sep 25, 2026
CVE-2026-65828
Zammad: Pending upload deletion bypass via legacy attachment endpoint
2.3
CVSS
0.2%
EPSS
No
On KEV
Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the legacy destroy_form action on AttachmentsController deletes UploadCache Store records based solely on a user-supplied form_id without verifying that the requesting user owns those records. An authenticated attacker who learns another user's pending-upload UUID can silently remove temporary file uploads before the victim submits their ticket or article. This issue is fixed in version 7.1.2.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZA
zammad · zammad
< 7.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65828
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65828
github.com
https://github.com/zammad/zammad/commit/3b755736fdbee8ff6ddf53661d6912d3d3028325
github.com
https://github.com/zammad/zammad/security/advisories/GHSA-x4f3-367g-m93g
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