CVE-2026-1519

CWE-606CWE-770 — Allocation without Limits12 documents10 sources
Severity
7.5HIGH
EPSS
0.1%
top 74.19%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
ISC Bind 9
Timeline
PublishedMar 25

Description

If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶Alpinebind< 9.18.47-r0+3
▶Debianbind9< 1:9.18.47-1~deb12u1+2
▶Ubuntubind9< 1:9.18.39-0ubuntu0.22.04.3+2
▶CVEListV5isc/bind_99.11.0 — 9.16.50+6

🔴Vulnerability Details

5
OSV
bind9 vulnerabilities↗2026-03-25
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OSV
CVE-2026-1519: If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU↗2026-03-25
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GHSA
GHSA-84m6-p53c-x4wp: If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU↗2026-03-25
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OSV
CVE-2026-1519: If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU↗2026-03-25
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CVEList
Excessive NSEC3 iterations cause high CPU load during insecure delegation validation↗2026-03-25
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📋Vendor Advisories

4
Red Hat
bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated zone↗2026-03-25
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Ubuntu
Bind vulnerabilities↗2026-03-25
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Microsoft
Excessive NSEC3 iterations cause high CPU load during insecure delegation validation↗2026-03-10
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Debian
CVE-2026-1519: bind9 - If a BIND resolver is performing DNSSEC validation and encounters a maliciously ...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-1519 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-1519 bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated zone↗2026-03-25
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