CVE-2026-123588
Last modified
CVE-2026-123588 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The recursive resolver in Hickory DNS (all versions of the hickory-recursor crate, and hickory-resolver 0.26.0 before 0.26.2) caches an empty connection pool when it follows a referral with no glue records and all queries for the name servers' IP addresses fail. An attacker able to spoof DNS responses can make these lookups fail, causing all subsequent queries for the affected zone to fail until the cache entry expires or is evicted..
Description
The recursive resolver in Hickory DNS (all versions of the hickory-recursor crate, and hickory-resolver 0.26.0 before 0.26.2) caches an empty connection pool when it follows a referral with no glue records and all queries for the name servers' IP addresses fail. An attacker able to spoof DNS responses can make these lookups fail, causing all subsequent queries for the affected zone to fail until the cache entry expires or is evicted.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| hickory-dns | hickory-dns | <= 0.26.0-alpha.1 |
| hickory-dns | hickory-dns | >= 0.26.0, < 0.26.2 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-123588?
How severe is CVE-2026-123588?
How do I fix CVE-2026-123588?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-123582The validating recursive resolver and validating forwarder i…3.7
- CVE-2026-123583The recursive resolver in Hickory DNS hickory-recursor 0.25.…3.7
- CVE-2026-123584The hickory-net crate in Hickory DNS 0.26.0 before 0.26.2 st…5.9
- CVE-2026-123585The hickory-resolver component of Hickory DNS 0.25.0 before …5.3
- CVE-2026-123586Hickory DNS 0.25.0-alpha.3 through 0.25.2 contains a query a…7.5
- CVE-2026-123587The DNSSEC validation in the Hickory DNS hickory-net crate 0…6.8
- CVE-2026-123589The DNS-over-QUIC (DoQ) server in hickory-server (hickory-dn…5.3
- CVE-2026-12359IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Ver…8.1
- CVE-2026-123590Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hick…4.8
- CVE-2026-123591Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hick…5.9
- CVE-2026-123592The hickory-net crate in Hickory DNS 0.26.0-beta.1 before 0.…5.9
- CVE-2026-123593Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hick…4.8
Are you affected by CVE-2026-123588?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST