NVD security advisoryHigh
High advisory for ZITADEL 4.0.0
CVE-2026-119127 · Reported 29 Oct 2026
Full advisory details, affected packages, severity context, and original source.
Affected technology
ZITADEL 4.0.0Affected product
Advisory overview
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.