Out-of-bounds Read Affecting dnsdist package, versions [,1.9.13)[2.0.0-alpha0,2.0.4)
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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- published26 Apr 2026
- disclosed23 Apr 2026
- creditUnknown
Introduced: 23 Apr 2026
CVE-2026-33599 (opens in a new tab)How to fix?
Upgrade dnsdist to version 1.9.13, 2.0.4 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read via the autoUpgrade process. An attacker can cause a denial of service by sending a crafted SVCB response to a Discovery of Designated Resolvers request. This is only exploitable if the autoUpgrade (Lua) or auto_upgrade (YAML) settings are enabled.