CVE-2026-34721

MEDIUM

Zammad has Cross-site request forgery (CSRF) in OAuth callback endpoints

Title source: cna

Description

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the OAuth callback endpoints for Microsoft, Google, and Facebook external credentials do not validate a CSRF state parameter. This vulnerability is fixed in 7.0.1 and 6.5.4.

References (1)

[X_Refsource_Confirm] https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c

Scores

CVSS v3 6.5

EPSS 0.0002

EPSS Percentile 4.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-352

Status published

Products (3)

zammad/zammad 7.0.0

zammad/zammad < 6.5.4 (2 CPE variants)

zammad/zammad >= 7.0.0-alpha, < 7.0.1

Published Apr 08, 2026

Tracked Since Apr 09, 2026