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    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, 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.

    Published:Oct 29, 2026
    Last Modified:Oct 29, 2026
    EPS:Oct 29, 2026
    EPSS Score:
    CVSS Score:8.1

    Affected Products

    Vendor
    Zitadel
    Product
    Zitadel

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-50 Password Recovery Exploitation

    Related CVEs

    CVE-2026-119129 (CVSS 8.6) — ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.19.5 contains a missing authorization vulnerability in Login V…
    CVE-2026-119128 (CVSS 9.1) — ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows una…
    CVE-2026-109374 (CVSS 5.1) — ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in OIDC token exchange that allows e…
    CVE-2026-109373 (CVSS 9.2) — ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows una…
    CVE-2026-109372 (CVSS 9.3) — ZITADEL 4.x before 4.19.2 and 3.x through 3.4.15 contains an authentication bypass in the SAML identity-provid…
    CVE-2026-109371 (CVSS 8.8) — ZITADEL 3.0.0 before 4.18.0 contains a missing authentication vulnerability in the hosted Login V1 UI, where t…
    CVE-2026-105215 (CVSS 9.3) — ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 UI becaus…
    CVE-2026-105214 (CVSS 2.3) — Zitadel before 4.16.2 contains a server-side request forgery vulnerability that allows attackers to make the s…
    CVE-2026-105213 (CVSS 8.8) — ZITADEL 4.x before 4.17.1 does not check an organization's inactive state during Login V2 authentication, veri…
    CVE-2026-105212 (CVSS 8.7) — ZITADEL 3.x before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 and L…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High