CVE-2026-34720CWE-346

Zammad has an origin validation error in SSO mechanism

Low · published April 8, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
3.2
In the wild
Unconfirmed
What it is

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the SSO mechanism in Zammad was not verifying the header originates from a trusted SSO proxy/gateway before applying further actions on it. This vulnerability is fixed in 7.0.1 and 6.5.4.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00142 · 3.2th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-04-08T18:11Z
EPSS history
Timeline
  • 08 APR 18:11Z
    Zammad has an origin validation error in SSO mechanism
    cvelistv5