VULNERABILITY INTELLIGENCE
CVE-2026-3593
CVSS score7.4 HIGH
EPSS probability1.54%
CISA KEVNot currently listed
Published2026-05-20
Last modified2026-08-24
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Description
A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.
Weakness classification
- security-officer@isc.org: CWE-416
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-825