authentik: Authentication bypass via assertion confusion in SAML sources
Summary
| CVE | CVE-2026-94612 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 17:17:17 UTC |
| Updated | 2026-09-24 18:19:08 UTC |
| Description | authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that Source. The SAML Source also does not record already accepted assertions, allowing replay. An unauthenticated actor who possesses such a valid assertion can use an assertion intended for another service provider or reuse an earlier assertion to authenticate as the user named by the assertion. Only SAML Sources are affected; SAML Providers and other Source types are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2. |
Risk And Classification
Primary CVSS: v3.1 7.4 HIGH from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Problem Types: CWE-287 | CWE-345 | CWE-287 CWE-287: Improper Authentication | CWE-345 CWE-345: Insufficient Verification of Data Authenticity
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.4 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | CNA | DECLARED | 7.4 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Goauthentik | Authentik | affected < 2026.2.7 | Not specified |
| CNA | Goauthentik | Authentik | affected >= 2026.5.0, < 2026.5.7 | Not specified |
| CNA | Goauthentik | Authentik | affected >= 2026.8.0, < 2026.8.2 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/goauthentik/authentik/commit/54fac864a0b3bc00551af1908f662b3b... | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25972 | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25962 | [email protected] | github.com | |
| docs.goauthentik.io/releases/2026.5 | [email protected] | docs.goauthentik.io | |
| docs.goauthentik.io/releases/2026.2 | [email protected] | docs.goauthentik.io | |
| docs.goauthentik.io/releases/2026.8 | [email protected] | docs.goauthentik.io | |
| github.com/goauthentik/authentik/security/advisories/GHSA-cqj8-fxxf-9pg7 | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25967 | [email protected] | github.com | |
| github.com/goauthentik/authentik/releases/tag/version/2026.2.7 | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25957 | [email protected] | github.com | |
| github.com/goauthentik/authentik/commit/984b0162711f0d1988ed33544d0a671c... | [email protected] | github.com | |
| github.com/goauthentik/authentik/commit/287ea13cdc23c378abc20a7b71c9c791... | [email protected] | github.com | |
| github.com/goauthentik/authentik/releases/tag/version/2026.8.2 | [email protected] | github.com | |
| github.com/goauthentik/authentik/releases/tag/version/2026.5.7 | [email protected] | github.com | |
| github.com/goauthentik/authentik/commit/355d8cc3d755fbba05fc5fa90ffbcbe6... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.