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Vulnerabilities

Vulnerability · CVE-2026-0707

A flaw was found in Keycloak.

Published Jan 8, 2026 · catalog updated Oct 26, 2026 · Red Hat Red Hat build of Keycloak 26.4

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-0707. EPSS is 0.40%. Act only if a listed version of Red Hat Red Hat build of Keycloak 26.4 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.40%
Remediation
Advisory link
Affected products
vendor Red Hat Red Hat build of Keycloak 26.4 patch: 26.4-12

A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat build of Keycloak 26.4 patch: 26.4-12patch: 26.4-12

How to fix CVE-2026-0707

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-0707. EPSS is 0.40%. Act only if a listed version of Red Hat Red Hat build of Keycloak 26.4 is installed.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat build of Keycloak 26.4 patch: 26.4-12 patch: 26.4-12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-551. EPSS 0.40%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 8, 2026 · NIST NVD

    Detected

    A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.

  2. Oct 26, 2026 · NIST NVD

    Updated

    A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.

Sources

  • CVE.orgVulnerability recordCVE-2026-0707

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2026-1461

    A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 spe

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2026-0707

    A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 spe

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • EUVDOct 29, 2026
  • CVE.orgOct 27, 2026
  • NIST NVDOct 26, 2026