CVE-2026-42504

high

Description

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

References

https://pkg.go.dev/vuln/GO-2026-5038

https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw

https://go.dev/issue/79217

https://go.dev/cl/774481

Details

Source: Mitre, NVD

Published: 2026-06-02

Updated: 2026-06-03

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.00018