CVE-2026-11605

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-22. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time. This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
—
EPSS
—
KEV
Not listed

Published

July 22, 2026

Last Modified

July 22, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic

CVE-2026-11605: Unnecessary validation of DNSSEC signed records

https://kb.isc.org/docs/cve-2026-11605
generic

Index of /isc/bind9/9.21.24

https://downloads.isc.org/isc/bind9/9.21.24
generic

Index of /isc/bind9/9.20.26

https://downloads.isc.org/isc/bind9/9.20.26

Vendor Advisories for CVE-2026-11605(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 8× 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. 2026-07-22 21:59 UTCEG score recompute
  2. 2026-07-22 21:59 UTCGHSA enrichment
  3. 2026-07-22 19:05 UTCEG score recompute
  4. 2026-07-22 19:04 UTCGHSA enrichment
  5. 2026-07-22 17:10 UTCEG score recompute
  6. 2026-07-22 17:09 UTCGHSA enrichment
  7. 2026-07-22 14:48 UTCEG score recompute
  8. 2026-07-22 14:46 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-11605?
CVE-2026-11605 is a high vulnerability published on July 22, 2026. The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to…
When was CVE-2026-11605 disclosed?
CVE-2026-11605 was first published in the National Vulnerability Database on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-11605?
CVE-2026-11605 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-11605?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11605, 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-2026-11605

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