Authentication bypass in keycloak
Priority LOW 34CWE-305Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
A vulnerability was found in all versions of Keycloak Gatekeeper, where on using lower case HTTP headers (via cURL) an attacker can bypass our Gatekeeper. Lower case headers are also accepted by some webservers (e.g. Jetty). This means there is no protection when we put a Gatekeeper in front of a Jetty server and use lowercase headers.
Why it matters now
EPSS 0.0093 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | keycloak | all versions as of 2021-02-22 | — | No fix listed | CNA |
| — | github.com/keycloak/keycloak-gatekeeper (Go) | up to 1.2.8 | — | No fix listed | GHSA-jh6m-3pqw-242h |
- keycloak Vendor— Affected all versions as of 2021-02-22 Fixed in — No fix listed CNA
- github.com/keycloak/keycloak-gatekeeper (Go) Vendor— Affected up to 1.2.8 Fixed in — No fix listed GHSA-jh6m-3pqw-242h
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Single Sign-On 7
Timeline
- 2026-10-02 Threatist record created from CVE-2020-14359
- 2026-10-03 Alias added: GHSA-jh6m-3pqw-242h
References
Advisory 3
Sources
- CVE-2020-14359 · CVE Program
- CVE-2020-14359 · NVD
- FIRST EPSS
- GHSA-jh6m-3pqw-242h · GitHub Advisory Database · CC BY 4.0
- CVE-2020-14359 · Red Hat security data · CC BY 4.0
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