CVE-2026-5946

HIGHNVD 7.57.5—

7.5

Multiple flaws have been identified in named related to the handling of DNS messages whose CLASS is not Internet (IN) — for example, CHAOS or HESIOD, or DNS messages that specify meta-classes (ANY or NONE) in the question section. Specially crafted requests reaching the affected code paths — recursion, dynamic updates (UPDATE), zone change notifications (NOTIFY), or processing of IN-specific record types in non-IN data — can cause assertion failures in named. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 11.0%
KEV: Not listed

Published

May 20, 2026

Last Modified

May 21, 2026

References (4)

security-officer@ischttps://downloads.isc.org/isc/bind9/9.18.49
security-officer@ischttps://downloads.isc.org/isc/bind9/9.20.23
security-officer@ischttps://downloads.isc.org/isc/bind9/9.21.22
security-officer@ischttps://kb.isc.org/docs/cve-2026-5946

Vendor Advisories for CVE-2026-5946(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-cqgq-ff3f-rj7r
GitHub Security AdvisoriesHigh
Multiple flaws have been identified in `named` related to the handling of DNS messages whose...

Frequently asked(5)

What is CVE-2026-5946?

CVE-2026-5946 is a high vulnerability published on May 20, 2026. Multiple flaws have been identified in named related to the handling of DNS messages whose CLASS is not Internet (IN) — for example, CHAOS or HESIOD, or DNS messages that specify meta-classes (ANY or NONE) in the question section. Specially crafted requests reaching the affected code paths —…

When was CVE-2026-5946 disclosed?

CVE-2026-5946 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-5946 actively exploited?

CVE-2026-5946 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-5946?

CVE-2026-5946 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2026-5946?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5946, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-5946

📅 Published

🔄 Last Modified

🔗 References (4)

📣 Vendor Advisories for CVE-2026-5946(1)

❓ Frequently asked(5)