CVE-2026-34720

2.3 lowEPSS 0.1%

Low (2.3) in zammad zammad. EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

2.3 low

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

CVSS 3.1

4.3 medium

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-31)
CWE: CWE-346
Published: 2026-04-08
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

zammad:zammad

References

https://github.com/zammad/zammad/security/advisories/GHSA-hcv6-w4h9-p2p7

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