GHSA-83HF-93M4-RGWQ: CVE-2026-42254: Cross-Zone DNS Cache Poisoning in Hickory DNS Recursor

📰 Dev.to · CVE Reports

Learn about CVE-2026-42254, a Cross-Zone DNS Cache Poisoning vulnerability in Hickory DNS Recursor, and how to address it

intermediate Published 30 Apr 2026
Action Steps
  1. Identify Hickory DNS Recursor versions vulnerable to CVE-2026-42254
  2. Update to the latest patched version of Hickory DNS Recursor
  3. Configure DNS cache poisoning mitigation techniques, such as DNSSEC and query logging
  4. Test DNS resolution to ensure cache poisoning is prevented
  5. Monitor DNS traffic for potential security threats
Who Needs to Know This

Security teams and developers responsible for DNS infrastructure can benefit from understanding this vulnerability to protect their systems

Key Insight

💡 Cross-Zone DNS Cache Poisoning can compromise DNS security, and updating to the latest patched version of Hickory DNS Recursor is crucial to prevent this vulnerability

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💡 CVE-2026-42254: Cross-Zone DNS Cache Poisoning in Hickory DNS Recursor. Update and configure mitigation techniques to protect your DNS infrastructure!
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