Improper Input Validation Affecting unbound package, versions [1.7.0,1.25.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-UNBOUND-18488394
- published31 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-44690 (opens in a new tab)How to fix?
Upgrade unbound to version 1.25.2 or higher.
Overview
Affected versions of this package are vulnerable to Improper Input Validation via insufficient validation of the RRSIG.Labels field and premature cache writes during aggressive NSEC processing. An attacker can manipulate DNS resolution for arbitrary sibling zones under NSEC-signed parent domains by controlling a delegated zone, potentially redirecting users to malicious destinations.