Missing Authentication for Critical Function Affecting nsd package, versions [,4.14.3)
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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Start learning- Snyk IDSNYK-UNMANAGED-NSD-17660909
- published28 Jun 2026
- disclosed25 Jun 2026
- creditUnknown
Introduced: 25 Jun 2026
CVE-2026-12490 (opens in a new tab)How to fix?
Upgrade nsd to version 4.14.3 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authentication for Critical Function due to improper enforcement of client certificate requirements in the provide-xfr process when a tls-auth-name is specified. An attacker can gain unauthorized access to perform zone transfers by initiating a connection over TLS on the regular tls-port or over TCP on the standard port, bypassing the expected certificate verification.