CVE-2026-42504

Quadratic complexity in WordDecoder.DecodeHeader in mime

CVSS 7.5 HIGHEPSS 0.6%CWE-407

Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Productos afectados

Go standard library · mime

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Referencias

https://go.dev/cl/774481 https://go.dev/issue/79217 https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw https://pkg.go.dev/vuln/GO-2026-5038