HIGHpublic-safe

CVE-2026-16442

NVD: A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. NVD: The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. NVD: This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.

CVSS
7.4 Severity
HIGH EPSS
0.0020 (10) KEV
-

Source-published summary

Possible impact

Source describes local exposure. Possible impact: This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for local exposure.

Affected context

vendor/product: redhat / build_of_keycloak

Remediation / advisory

Remediation reference present; patch status requires confirmation in the linked advisory.

Why it matters

Source describes local exposure. Possible impact: This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for local exposure.; CVSS 7.4 (HIGH); EPSS percentile 10; not listed in KEV; Remediation reference present; patch status requires confirmation in the linked advisory; sources: NVD, Vendor Advisory.

What to verify

Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.

Exposure hint

local exposure

Impact tags

local exposure relevant

Urgency reasons

CVSS HIGHaffected product presentvendor advisory presentrecent updateremediation reference present

Source-derived note

Summary derived from NVD / Vendor Advisory description; unsafe procedural detail is not shown.

Redaction metadata

source summary used: True
fallback summary used: False
unsafe procedural detail present: false
raw source displayed: false
public summary redacted: true

Remediation handoff

Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.

Handoff JSON Handoff Markdown Safe Codex prompt

Safety note

This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.