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CVE-2026-11721

🗓️ 22 Jul 2026 14:13:08Reported by iscType 
cve
 cve
🔗 web.nvd.nist.gov👁 6 Views

Cache poisoning in named from RRSIG label mismatch enabling a wildcard with synth-from-dnssec.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-11721
22 Jul 202614:13
attackerkb
Circl
CVE-2026-11721
22 Jul 202616:47
circl
Cvelist
CVE-2026-11721 Cache poisoning possible with label count discrepancy, RRSIG, and wildcards
22 Jul 202614:13
cvelist
Debian CVE
CVE-2026-11721
22 Jul 202614:13
debiancve
EUVD
EUVD-2026-47709
22 Jul 202614:13
euvd
NVD
CVE-2026-11721
22 Jul 202615:16
nvd
OSV
DEBIAN-CVE-2026-11721
22 Jul 202617:48
osv
Positive Technologies
PT-2026-63417
22 Jul 202600:00
ptsecurity
RedhatCVE
CVE-2026-11721
22 Jul 202615:42
redhatcve
Vulnrichment
CVE-2026-11721 Cache poisoning possible with label count discrepancy, RRSIG, and wildcards
22 Jul 202614:13
vulnrichment
Rows per page
CNA
Node
OR
iscbindRange9.11.09.18.50
iscbindRange9.20.09.20.24
iscbindRange9.21.09.21.23
iscbindRange9.11.3-s19.18.50-s1
iscbindRange9.20.9-s19.20.24-s1
[
  {
    "vendor": "ISC",
    "product": "BIND 9",
    "versions": [
      {
        "version": "9.11.0",
        "lessThanOrEqual": "9.18.50",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.20.0",
        "lessThanOrEqual": "9.20.24",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.21.0",
        "lessThanOrEqual": "9.21.23",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.11.3-S1",
        "lessThanOrEqual": "9.18.50-S1",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.20.9-S1",
        "lessThanOrEqual": "9.20.24-S1",
        "status": "affected",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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22 Jul 2026 20:33Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.17.5
SSVC
6