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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-24281

CVE-2026-24281: 2 tracked advisory records across Apache, 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

Apache

1 advisory
  • Advisory severityUnrated

    Advisory [CVE-2026-24281] Apache ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager

    CVE-2026-24281Source published Source updated

    Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.

    Affected products in this advisory
    • Apache ZooKeeper
    Source-reported affected versions
    • Apache ZooKeeper 3.9.0 through 3.9.4
    • Apache ZooKeeper 3.8.0 through 3.8.5
    Source-reported fixed versions
    • 3.8.6
    • 3.9.5
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Workarounds
    • Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh7.4

    High [CVE-2026-24281] Impersonation of servers or clients via reverse DNS spoofing

    CVE-2026-24281Source published

    Impersonation of servers or clients via reverse DNS spoofing. Red Hat rates this important (CVSS 7.4). Weakness: CWE-295. Affected package(s): zookeeper, rhoai/odh-modelmesh-rhel9:1776756834. Resolved in Red Hat advisory RHSA-2026:14276 — update the affected packages (`sudo dnf update`).

    Affected products in this advisory
    • Red Hat OpenShift AI 2.25
    • Red Hat build of Debezium 2
    • Red Hat build of Debezium 3
    • Red Hat Fuse 7

    3 more entries in the full advisory.

    Source-reported affected versions
    • zookeeper
    • rhoai/odh-modelmesh-rhel9:1776756834
    Source-reported fixed versions
    • RHSA-2026:14276
    Mitigation guidance
    • Update the affected package(s) to the fixed version shipped in RHSA-2026:14276 (`sudo dnf update` / `yum update`).
    Full advisory and evidenceOpen source bulletin

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