CVE-2026-105211: critical vulnerability in zitadel
ZITADEL before 4.17.1 Authentication Bypass via Login V2 OTP returnCode
Published · Updated
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.2epss 0.3%
exploitation probability
0.3%top 76% of all CVEs
observed exploitation
nono source reports it
ZITADEL before 4.17.1 contains an authentication bypass vulnerability in Login V2 that allows unauthenticated attackers to take over accounts by obtaining OTP codes via the returnCode delivery type. Attackers knowing a login name of a victim with OTP-Email and OTP-SMS enrolled can read both codes from server-action responses to gain MFA-authenticated sessions, including administrator takeover.
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
zitadel · zitadelRelated CVEs — zitadel
In the same product, most dangerous first.
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