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Highest advisory severityMedium 1 vendor · 2 advisories

CVE-2026-9798

CVE-2026-9798: 2 tracked advisory records across Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

2 advisories
  • Advisory severityMedium4.3

    Medium [CVE-2026-16103 +1] Incomplete fix for CIBA brute-force lockout bypass at token redemption

    CVE-2026-16103Source published Source updated

    This bulletin covers 2 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    A flaw was found in the keycloak-services component of Keycloak. This issue is an incomplete fix for CVE-2026-9798, where brute-force protection checks were added to the Client-Initiated Backchannel Authentication (CIBA) initiation handler but were omitted from the token redemption handler. This allows an attacker with valid client credentials to obtain access and refresh tokens for a user account that has been locked due to brute-force protection, provided the authentication request was started before the lockout occurred and was approved by the user. The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that successful exploitation allows an attacker to obtain a valid user session for an account that should be temporarily disabled by…

    Affected products in this advisory
    • Red Hat Build of Keycloak
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    Full advisory and evidenceOpen source bulletin
  • Advisory severityMedium4.3

    Medium [CVE-2026-9798] brute-force protection bypass in ciba flow

    CVE-2026-9798Source published Source updated

    A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication (CIBA) flow to bypass this brute-force protection. This allows continued authentication attempts and token issuance even when the account should be locked, potentially enabling further unauthorized access attempts. Affected products named by the advisory: Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.6.

    Affected products in this advisory
    • Red Hat build of Keycloak 26.4
    • Red Hat build of Keycloak 26.6
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

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