Vulnerability in Hickory-Dns
CVE-2026-123583
The recursive resolver in Hickory DNS hickory-recursor 0.25.0 through 0.25.2 and hickory-resolver 0.26.0 before 0.26.2 does not apply out-of-bailiwick filtering to negative responses. Attackers able to supply crafted negative responses can include out-of-bailiwick records to facilitate cache poisoning and more easily exploit other DNSSEC verification flaws.
Published .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (1.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- github.com/hickory-dns/hickory-dns/security/advisories/GHSA-vcjp-57rr-mpfw (vendor-advisory)
- www.vulncheck.com/advisories/hickory-dns-0.25.0-through-0.25.2-missing-bailiwic… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123583?
- CVE-2026-123583 is a low-severity vulnerability in Hickory-Dns, classified under CWE-349. CVSS score: 3.7/10. Published 2026-11-08.
- How severe is CVE-2026-123583?
- Low severity. CVSS v3 base score is 3.7 out of 10.