Use After Free Affecting ruby package, versions [4.0.0,4.0.5)
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-RUBY-17660647
- published27 Jun 2026
- disclosed23 May 2026
- creditUnknown
Introduced: 23 May 2026
CVE-2026-46727 (opens in a new tab)How to fix?
Upgrade ruby to version 4.0.5 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the rb_getaddrinfo process. An attacker can cause a crash or potentially achieve memory corruption by delaying DNS responses near the user-specified timeout, for example, through a crafted authoritative DNS server or recursive resolver.