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Advisory record · GHSA-5j98-2g5x-46v6

hickory-resolver: Resolver::lookup() and Resolver::lookup_ip() APIs obscure DNSSEC validation failures

CVSS 8.7 HighEPSS 0.0023 · 13th percentile

Published by the GitHub Advisory Database at 5 Oct 2026, 22:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
hickory-resolvercrates.io<0.26.20.26.2
Identifiers
GHSA-5j98-2g5x-46v6 · CVE-2026-93657
Weakness (CWE)
CWE-347
Tags
Published
5 Oct 2026
Updated
5 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

hickory-resolver versions before 0.26.2 return Ok results from Resolver::lookup() and Resolver::lookup_ip() on a resolver with DNSSEC validation enabled, even when validation fails. The source gives few details on what an attacker needs to exploit this. Upgrade to hickory-resolver 0.26.2.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0023, the 13th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.