CVE-2026-1519
HIGHCVSS v3.1: 7.5 · EPSS: 0.0082 (52.7 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.5 v3.1 · NVD
- EPSS
- 0.0082 (52.7 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Resource Exhaustion · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo privilegesNo user interaction · Source: NVD Vector
- Affected vendors
- isc
- Published
- 2026-03-25 · Modified: 2026-06-30
- References
- Jump to references (8)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Reference https://downloads.isc.org/isc/bind9/9.18.47
- Reference https://downloads.isc.org/isc/bind9/9.20.21
- Reference https://downloads.isc.org/isc/bind9/9.21.20
- Reference https://kb.isc.org/docs/cve-2026-1519
- Distro https://lists.debian.org/debian-lts-announce/2026/04/msg00008.html
- Distro https://access.redhat.com/errata/RHSA-2026:11371
- Distro https://access.redhat.com/errata/RHSA-2026:11372
- Distro https://access.redhat.com/errata/RHSA-2026:15890