Time-of-check Time-of-use (TOCTOU) Race Condition Affecting PowerDNS/pdns package, versions [0,]
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-POWERDNSPDNS-18305995
- published25 Jul 2026
- disclosed23 Jul 2026
- creditUnknown
Introduced: 23 Jul 2026
CVE-2026-52684 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition due to capping of TTLs is not enforced for lack of data. This does not happen on regular resolve, as then the child records are used immediately if not expired and thus valid, or the records are expired, and in that case not used. So this case can only happen if almost-expired records are used to refresh the authoritative NS records.