anyio vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary

CVE-2026-63349Highanyio: AnyIO run_process/open_process ignores extra_groups and can retain parent supplementary groups CVE-2026-63374Criticalanyio: AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing CVE-2026-64847Mediumanyio: AnyIO process-pool workers can block indefinitely on undrained stderr

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