CVE-2026-19662

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreHIGH confidence

Score 5.9 from GitHub Security Advisory published 2026-09-16. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

An attacker may be able to cause a named resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, and those answers arrive in a particular order with particular timing, the named resolver will encounter a use-after-free bug, and abort. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

CVSS v3
5.9
EG Score
5.9(high)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

CVE-2026-19662: qpcache NOQNAME proof use-after-free crashes recursive resolver

https://kb.isc.org/docs/cve-2026-19662
generic

Index of /isc/bind9/9.20.29

https://downloads.isc.org/isc/bind9/9.20.29

Vendor Advisories for CVE-2026-19662(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatbind-main-9.20.29-0.1.hum12026-09-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 17× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 13:40 UTCVendor advisory
  2. 2026-09-24 13:40 UTCGHSA enrichment
  3. 2026-09-23 14:30 UTCEG score recompute
  4. 2026-09-23 14:30 UTCVendor advisory
  5. 2026-09-23 14:30 UTCGHSA enrichment
  6. 2026-09-22 15:21 UTCEG score recompute
  7. 2026-09-22 15:21 UTCVendor advisory
  8. 2026-09-22 15:21 UTCGHSA enrichment
  9. 2026-09-21 16:10 UTCEG score recompute
  10. 2026-09-21 16:10 UTCVendor advisory
  11. 2026-09-21 16:10 UTCGHSA enrichment
  12. 2026-09-20 16:55 UTCGHSA enrichment
  13. 2026-09-19 17:46 UTCEG score recompute
  14. 2026-09-19 17:46 UTCGHSA enrichment
  15. 2026-09-18 19:27 UTCEPSS rescore
  16. 2026-09-18 18:37 UTCEG score recompute
  17. 2026-09-18 18:37 UTCGHSA enrichment
  18. 2026-09-17 19:27 UTCEG score recompute
  19. 2026-09-17 19:27 UTCGHSA enrichment
  20. 2026-09-17 18:56 UTCEG score recompute
  21. 2026-09-17 18:55 UTCGHSA enrichment
  22. 2026-09-16 19:32 UTCEG score recompute
  23. 2026-09-16 19:32 UTCGHSA enrichment
  24. 2026-09-16 14:23 UTCEG score recompute
  25. 2026-09-16 14:00 UTCEG score recompute
Show 1 more
  1. 2026-09-16 14:00 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-19662?
CVE-2026-19662 is a medium vulnerability published on September 16, 2026. An attacker may be able to cause a named resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, and…
When was CVE-2026-19662 disclosed?
CVE-2026-19662 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19662 actively exploited?
CVE-2026-19662 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.5% of all scored CVEs.
What is the CVSS score of CVE-2026-19662?
CVE-2026-19662 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-19662?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19662, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-19662

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