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TI-2020-18030 Aliases CVE-2020-35509GHSA-rpj2-w6fr-79hc

Improper input validation in keycloak

Priority LOW 24CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-295.

Summary

A flaw was found in keycloak affecting versions 11.0.3 and 12.0.0. An expired certificate would be accepted by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00352 29th percentileScored 2026-11-07
Fix Fixed org.keycloak:keycloak-core (Maven): 14.0.0Red Hat: 4 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

VendorProductAffected versionsFixed inStatusSource
—keycloak11.0.3, 12.0.0—No fix listedCNA
—org.keycloak:keycloak-core (Maven)before 14.0.014.0.0Patch availableGHSA-rpj2-w6fr-79hc
  • keycloak Vendor— Affected 11.0.3, 12.0.0 Fixed in — No fix listed CNA
  • org.keycloak:keycloak-core (Maven) Vendor— Affected before 14.0.0 Fixed in 14.0.0 Patch available GHSA-rpj2-w6fr-79hc

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:redhat:keycloak:11.0.3:*:*:*:*:*:*:*11.0.3VulnerableRed Hat
cpe:2.3:a:redhat:keycloak:12.0.0:*:*:*:*:*:*:*12.0.0VulnerableRed Hat
  • cpe:2.3:a:redhat:keycloak:11.0.3:*:*:*:*:*:*:* Versions 11.0.3 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:keycloak:12.0.0:*:*:*:*:*:*:* Versions 12.0.0 Vulnerable ·Red Hat

Remediation

  • Fix · GHSA-rpj2-w6fr-79hc org.keycloak:keycloak-core (Maven) Fixed in 14.0.0 Advisory →

Red Hat 4 advisories

  • RHSA-2021:3534 Released 2021-09-14 · Red Hat rating Moderate
    Red Hat Single Sign-On 7.4.9 security update
    • Red Hat Single Sign-On 7.4.9
  • RHSA-2021:3527 Released 2021-09-14 · Red Hat rating Moderate
    Red Hat Single Sign-On 7.4.9 security update on RHEL 6
    • Red Hat Single Sign-On 7.4 for RHEL 6 Server rh-sso7-keycloak-9.0.15-1.redhat_00002.1.el6sso, rh-sso7-keycloak-server-9.0.15-1.redhat_00002.1.el6sso
  • RHSA-2021:3529 Released 2021-09-14 · Red Hat rating Moderate
    Red Hat Single Sign-On 7.4.9 security update on RHEL 8
    • Red Hat Single Sign-On 7.4 for RHEL 8 rh-sso7-keycloak-9.0.15-1.redhat_00002.1.el8sso, rh-sso7-keycloak-server-9.0.15-1.redhat_00002.1.el8sso
Show 1 more Red Hat advisories
  • RHSA-2021:3528 Released 2021-09-14 · Red Hat rating Moderate
    Red Hat Single Sign-On 7.4.9 security update on RHEL 7
    • Red Hat Single Sign-On 7.4 for RHEL 7 Server rh-sso7-keycloak-9.0.15-1.redhat_00002.1.el7sso, rh-sso7-keycloak-server-9.0.15-1.redhat_00002.1.el7sso

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Single Sign-On 7.4 for RHEL 6 ServerFixed RHSA-2021:3527
Red Hat Single Sign-On 7.4 for RHEL 7 ServerFixed RHSA-2021:3528
Red Hat Single Sign-On 7.4 for RHEL 8Fixed RHSA-2021:3529
Red Hat Single Sign-On 7.4.9Fixed RHSA-2021:3534
Not affected: 6 products
  • Red Hat Decision Manager 7
  • Red Hat Fuse 7
  • Red Hat Integration Camel K 1
  • Red Hat OpenShift Application Runtimes
  • Red Hat Process Automation 7
  • Red Hat support for Spring Boot

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-35509
  2. 2026-10-03 Alias added: GHSA-rpj2-w6fr-79hc

References

Advisory 2

Other 6

  • TI-2024-01049 Keycloak: path transversal in redirection validation CVSS 3.1HIGH 8.1
  • TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
  • TI-2020-08665 Server-side request forgery in keycloak CVSS 3.1MEDIUM 5.3
  • TI-2022-03468 Path traversal in Red Hat Keycloak CVSS 3.1CRITICAL 9.1
  • TI-2021-03612 A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak. CVSS 3.1MEDIUM 6.1
  • TI-2022-03994 Cross-site scripting in keycloak CVSS 3.1CRITICAL 10.0
See all 97 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences