CVE-2026-1519

HIGH EPSS 52.7%
Published Mar 25, 20263mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 25, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
52.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-606

Affected Products 4

VendorProductVersionRange
iscbind*≥9.11.0  –  ≤9.16.50
iscbind*≥9.18.0  –  <9.18.47
iscbind*≥9.20.0  –  <9.20.21
iscbind*≥9.21.0  –  <9.21.20

References 5

  • downloads.isc.org https://downloads.isc.org/isc/bind9/9.18.47
    Patch
  • downloads.isc.org https://downloads.isc.org/isc/bind9/9.20.21
    Patch
  • downloads.isc.org https://downloads.isc.org/isc/bind9/9.21.20
    Patch
  • kb.isc.org https://kb.isc.org/docs/cve-2026-1519
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2026/04/msg00008.html
    Issue TrackingThird Party Advisory

Remediation