Vulnerability Description
Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
CVSS Score
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Related Weaknesses (CWE)
References
- 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
FAQ
What is CVE-2026-42504?
CVE-2026-42504 is a vulnerability with a CVSS score of 7.5 (HIGH). Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
How severe is CVE-2026-42504?
CVE-2026-42504 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42504?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.