Description
authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, authentik email authenticator enrollment during an authentication or enrollment flow accepts a recipient address supplied in the setup request instead of using the address already established by the flow. An actor who knows a target user's password can substitute an attacker-controlled address, receive the one-time code, and finish enrolling the factor as the target. The target must not have enrolled the email factor already. Successful enrollment gives the actor a session as the target and access to single sign-on applications behind the account. Other authenticator types are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.
References10
- docs.goauthentik.io/releases/2026.2#fixed-in-202627
- docs.goauthentik.io/releases/2026.5#fixed-in-202657
- docs.goauthentik.io/releases/2026.8#fixed-in-202682
- github.com/goauthentik/authentik/commit/01d4349f2aaa9beda532f92…
- github.com/goauthentik/authentik/commit/1fcf9868133e5d05e266edb…
- github.com/goauthentik/authentik/commit/c10ae83ebf8c61de2f1922e…
- github.com/goauthentik/authentik/commit/ec41732339726fba477182c…
- github.com/goauthentik/authentik/pull/25958
- github.com/goauthentik/authentik/pull/25963
- github.com/goauthentik/authentik/pull/25968
Metrics
- CVSS 3.1
-
8.9
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L - EPSS — exploit probability
- 0% percentile: 42 · as of 9 November 2026
- CWE
- CWE-287CWE-807
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