Keycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauthn token replay
Priority LOW 30CWE-294Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-294.
Summary
A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0044 38th percentileScored 2026-11-07
Fix Fixed org.keycloak:keycloak-services (Maven): 26.6.2Red Hat: 2 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4.12-1 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4-17 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4-17 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4.12 | — | — | Not affected | CNA |
| — | org.keycloak:keycloak-services (Maven) | before 26.6.2 | 26.6.2 | Patch available | GHSA-w4p5-rfh6-cwrv |
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4.12-1 Patch available CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-17 Patch available CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-17 Patch available CNA
- Red Hat build of Keycloak 26.4.12 VendorRed Hat Affected — Fixed in — Not affected CNA
- org.keycloak:keycloak-services (Maven) Vendor— Affected before 26.6.2 Fixed in 26.6.2 Patch available GHSA-w4p5-rfh6-cwrv
Remediation
- Fix · GHSA-w4p5-rfh6-cwrv org.keycloak:keycloak-services (Maven) Fixed in 26.6.2 Advisory →
Red Hat 2 advisories
- RHSA-2026:19597 Released 2026-05-20 · Red Hat rating ImportantRed Hat build of Keycloak 26.4.12 Images Security Update
- Red Hat build of Keycloak 26.4 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
- RHSA-2026:19596 Released 2026-05-20 · Red Hat rating ImportantRed Hat build of Keycloak 26.4.12 Security Update
- Red Hat build of Keycloak 26.4.12
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat build of Keycloak 26.4 | Fixed | RHSA-2026:19597 |
| Red Hat build of Keycloak 26.4.12 | Fixed | RHSA-2026:19596 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-37982
- 2026-10-03 Alias added: GHSA-w4p5-rfh6-cwrv
- 2026-10-29 Weakness changed · CNA
References
Advisory 5
More Red Hat Build Of Keycloak vulnerabilities
- TI-2026-02223 Keycloak: keycloak: unauthorized authentication via disabled saml identity provider CVSS 3.1HIGH 8.1
- TI-2024-01049 Keycloak: path transversal in redirection validation CVSS 3.1HIGH 8.1
- TI-2026-13740 Keycloak-services: keycloak-services: saml idp-initiated broker login bypasses link-only restriction CVSS 3.1CRITICAL 9.8
- TI-2026-13741 Keycloak-services: keycloak-services: saml broker metadata import disables response signature validation CVSS 3.1CRITICAL 9.1
- TI-2026-13106 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation CVSS 3.1HIGH 8.8
- TI-2026-02631 Authentication bypass in Red Hat build of Keycloak 26.2 CVSS 3.1HIGH 8.8
Sources
- CVE-2026-37982 · CVE Program
- CVE-2026-37982 · NVD
- FIRST EPSS
- GHSA-w4p5-rfh6-cwrv · GitHub Advisory Database · CC BY 4.0
- CVE-2026-37982 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences