CVSS 4.0
6.3 mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:NCVE-2026-123593
Medium (6.3) in hickory-dns hickory-dns. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
On this page
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto 0.24.0 through 0.26.0-alpha.1 compare DNSKEY public keys against DNSSEC trust anchors without checking the DNSKEY record name, so an RRset made up only of trusted keys is accepted without RRSIG verification. Attackers able to spoof or control name server responses can replace a secure zone's DNSKEY RRset with the root zone's keys, and use a large TTL to keep it cached.
Severity
CVSS 3.1
4.8 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 16th percentile. Scored 2026-11-10. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-1023 Incomplete Comparison with Missing Factors
- Published
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Explain CVE-2026-123593 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-123593?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-123593?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-123593 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| hickory-dns | from 0.26.0-beta.1 before 0.26.2 |
| hickory-dns | from 0.24.0 through 0.26.0-alpha.1 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 13, 14 | rust-hickory-proto | no fix listed | DEBIAN-CVE-2026-123593 |
| Debian | 14 | rust-hickory-net | 0.26.3-1 | DEBIAN-CVE-2026-123593 |
| Ubuntu | 24.04:LTS, 26.04:LTS | rust-hickory-proto | no fix listed | UBUNTU-CVE-2026-123593 |
| Ubuntu | 26.10 | rust-hickory-net, rust-hickory-proto | no fix listed | UBUNTU-CVE-2026-123593 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu.