authentik: Denial of Service via Document Type Declarations in SAML Messages
Summary
| CVE | CVE-2026-94613 |
|---|---|
| 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 17:17:17 UTC |
| Description | authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/* or /source/saml/*, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations 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 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-770 | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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/732adad26bb97361b6bf25ef138df5c1... | [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 | |
| github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f7860168... | [email protected] | github.com | |
| github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm | [email protected] | github.com | |
| docs.goauthentik.io/releases/2026.8 | [email protected] | docs.goauthentik.io | |
| github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057... | [email protected] | github.com | |
| github.com/goauthentik/authentik/releases/tag/version/2026.2.7 | [email protected] | github.com | |
| github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df3... | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25969 | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25974 | [email protected] | github.com | |
| github.com/goauthentik/authentik/pull/25959 | [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/pull/25964 | [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.