CVE-2020-26030

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An issue was discovered in Zammad before 3.4.1. There is an authentication bypass in the SSO endpoint via a crafted header, when SSO is not configured. An attacker can create a valid and authenticated session that can be used to perform any actions in the name of other users.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287

Affected software

No affected versions have been published.

Timeline

Published
Dec 28, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-26030: Critical severity, CVSS 9.8 | Vulnix