HIGH 8.6 NVD
CVE-2026-119127
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, in
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.
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-mchc-246r-6m76
- https://www.vulncheck.com/advisories/zitadel-4.0.0-before-4.19.5-account-takeover-via-logi
This high severity vulnerability with a CVSS score of 8.6 was published on 2026-10-29 via NVD.
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