High 7.5Published Oct 21, 2026

CVE-2026-19630Amplified resource exhaustion in inbound message processing

Updated under an hour ago (Oct 26, 2026, 5:40 PM ET)

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It affects ISC BIND 9. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.45%, higher than 38% of scored CVEs.

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Every CVE for ISC BIND 9

Exploited in the last 30 days

In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-407
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.45% (percentile 38)
Assigned by: isc
NVD analysis: Awaiting Analysis
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

ISC BIND 9 isc:bind_9 (from the name)	from 9.11.0 through 9.18.50; from 9.20.0 through 9.20.29; from 9.21.0 through 9.21.26; from 9.11.3-S1 through 9.18.50-S1; from 9.20.9-S1 through 9.20.29-S1	CNA record

References

References

https://kb.isc.org/docs/cve-2026-19630	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.30	patch
https://downloads.isc.org/isc/bind9/9.21.27	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.