CVE-2020-28851: Golang Go

High severity, CVSS 7.5. EPSS: 2.3% chance of exploitation in the next 30 days.

In x/text in Go 1.15.4, an "index out of range" panic occurs in language.ParseAcceptLanguage while parsing the -u- extension. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)

Affected products

• Golang Go: version 1.15.4 only

Published 2021-01-02. Last modified 2026-06-17.