Description
ZITADEL 4.0.0 before 4.19.5 contains a host header injection vulnerability in the Login V2 UI that allows unauthenticated attackers to poison password-reset, invite, and email-verification links by supplying untrusted x-zitadel-public-host, x-zitadel-forward-host, or x-forwarded-host headers. Attackers knowing a victim's login name can point the links in genuine emails at their host, harvest the single-use codes when the links are opened, and take over accounts including instance administrators.
Related CPE's
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References
CVSS impact metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
8.1 · High
Information
Source identifier
Vulnerability status
Deferred
Published
2026-10-29T16:18:05.487Z
14 hours agoLast modified
2026-10-29T16:18:05.603Z
14 hours ago