CVE-2026-25748
Last modified
CVE-2026-25748 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. EPSS estimates a 0.48% chance of exploitation in the next 30 days.
Description
authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Goauthentik | Authentik | < 2025.10.4 |
| Goauthentik | Authentik | >= 2025.12.0, < 2025.12.4 |
References
- https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4Product, Release Notes
- https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4Product, Release Notes
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-25748?
How severe is CVE-2026-25748?
How do I fix CVE-2026-25748?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-25742Zulip is an open-source team collaboration tool. Prior to ve…5.3
- CVE-2026-25743OpenEMR is a free and open source electronic health records …4.8
- CVE-2026-25744OpenEMR is a free and open source electronic health records …6.5
- CVE-2026-25745OpenEMR is a free and open source electronic health records …6.5
- CVE-2026-25746OpenEMR is a free and open source electronic health records …8.8
- CVE-2026-25747Deserialization of Untrusted Data vulnerability in Apache Ca…8.8
- CVE-2026-25749Vim is an open source, command line text editor. Prior to ve…6.6
- CVE-2026-2575A flaw was found in Keycloak. An unauthenticated remote atta…5.3
- CVE-2026-25750Langchain Helm Charts are Helm charts for deploying Langchai…8.1
- CVE-2026-25751FUXA is a web-based Process Visualization (SCADA/HMI/Dashboa…7.5
- CVE-2026-25752FUXA is a web-based Process Visualization (SCADA/HMI/Dashboa…9.1
- CVE-2026-25753PlaciPy is a placement management system designed for educat…9.8
Are you affected by CVE-2026-25748?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST