Vulnerability · Published Sep 25, 2026 · Assigned by GitHub_M

CVE-2026-65828Zammad: Pending upload deletion bypass via legacy attachment endpoint

Low 2.3

In plain English

A low-severity missing authorization in zammad from zammad. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 4.0)2.3Low

Exploit odds (30 days)0.2%top 89.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
zammad	zammad	< 7.1.2

Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

References

https://github.com/zammad/zammad/security/advisories/GHSA-x4f3-367g-m93g x_refsource_CONFIRM
https://github.com/zammad/zammad/commit/3b755736fdbee8ff6ddf53661d6912d3d3028325 x_refsource_MISC