authentik: SourceStage bypass via empty POST
Priority HIGH 82CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00405 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed authentik (goauthentik): 2025.12.6, 2026.2.4, 2026.5.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| goauthentik | authentik | before 2025.12.6; before 2026.2.4; before 2026.5.1 | 2025.12.6, 2026.2.4, 2026.5.1 | Patch available | CNA |
- authentik Vendorgoauthentik Affected before 2025.12.6; before 2026.2.4; before 2026.5.1 Fixed in 2025.12.6, 2026.2.4, 2026.5.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* | before 2025.12.6; 2026.2.0 to before 2026.2.4; 2026.5.0 to before 2026.5.1 | Vulnerable | goauthentik |
- cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* Versions before 2025.12.6; 2026.2.0 to before 2026.2.4; 2026.5.0 to before 2026.5.1 Vulnerable ·goauthentik
Remediation
- Fix · CNA authentik (goauthentik) Fixed in 2025.12.6, 2026.2.4, 2026.5.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-49448
More goauthentik Authentik vulnerabilities
- TI-2022-07608 authentik vulnerable to Improper Authentication via invitation URL token reuse CVSS 3.1CRITICAL 9.4
- TI-2026-36598 authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API CVSS 3.1HIGH 8.8
- TI-2022-22816 authentik allows existing authenticated users to create arbitrary accounts CVSS 3.1MEDIUM 6.4
- TI-2024-25628 Insufficient access control for OAuth2 Device Code flow in authentik CVSS 3.1CRITICAL 9.8
- TI-2023-24876 authentik potential installation takeover when default admin user is deleted CVSS 3.1CRITICAL 9.8
- TI-2024-34964 authentik has an insecure default configuration for OAuth2 Redirect URIs CVSS 4.0HIGH 7.9
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences