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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-77955

CVE-2026-77955: 1 tracked advisory record 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

1 advisory
  • Advisory severityMedium4.4

    Medium [CVE-2026-77955] ZONEMD verification bypass due to asynchronous DNSSEC resolution

    CVE-2026-77955Source published Source updated

    ZONEMD verification bypass due to asynchronous DNSSEC resolution. Red Hat rates this moderate (CVSS 4.4). Weakness: CWE-345. Red Hat lists fixing advisory RHSA-2026:68590 with package unbound-main-1.26.1-1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 2 more.

    Related products — impact not confirmed
    • Red Hat Hardened Images
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 8
    • Red Hat Enterprise Linux 9

    2 more entries in the full advisory.

    Source-reported affected versions
    • < 1.13.2
    • < 1.26.1
    Source-reported fixed versions
    • unbound-main-1.26.1-1.hum1
    • RHSA-2026:68590
    Mitigation guidance
    • To mitigate this issue, avoid configuring Unbound with `zonemd-check: yes` for zones located below a trust anchor, especially when the `zonefile` option is also enabled. If ZONEMD is required, ensure that zones are not configured in a way that allows for this asynchronous resolution vulnerability. Disabling the `zonemd-check` option or removing the `zonefile` option for affected zones can prevent the attack window. A restart of the Unbound service is required for configuration changes to take effect.
    Full advisory and evidenceOpen source bulletin

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