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CVE-2026-59969: Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode

CVE-2026-59969: Apache ZooKeeper quorum TLS skips peer hostname verification in FIPS-mode deployments, enabling potential server-to-server impersonation.

Apache ZooKeeper versions 3.8.0-3.8.6 and 3.9.0-3.9.5 fail to enforce peer hostname verification for quorum TLS when FIPS mode is enabled with sslQuorum, zookeeper.fips-mode, and hostname verification settings turned on. The flaw is rated important and could allow an attacker to impersonate a quorum peer via certificate host mismatch. Users should upgrade to fixed versions.

oss-security · 20h agoVulnerabilityCVE-2026-59969

CISA and NIST Release Technical Checklist for Safeguarding Identity Tokens From Theft and Misuse

CISA and NIST published NIST IR 8587, final guidance for protecting identity tokens from forgery, theft, replay, and signing-key compromise.

NIST Interagency Report 8587 (September 15, 2026) expands the IA-13 'Identity Providers and Authorization Servers' control from NIST SP 800-53 R5.1.1, guiding federal agencies and cloud providers on SSO, identity federation, and machine-to-machine authentication. It requires hardware-backed signing-key storage for moderate-impact systems, 90-day key rotation for high-impact systems, token lifetimes under one hour, and sender-constrained mechanisms such as mutual TLS and DPoP. The report cites incidents including forged SAML assertions that exposed over 60,000 emails from a federal agency. It also extends guidance to agentic AI systems using signed tokens and urges post-quantum cryptography migration planning.

Cyber Security News · 21h agoAdvisory1