What’s Vulnerable › Vulnerabilities

CVE-2020-28852

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-01-02 · updated 2026-06-17
• Weakness: CWE-129

Description

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)

Affected products

• golang.org/x/text/language: before 0.3.5 — fixed in 0.3.5

How to fix

Upgrade to a fixed version: golang.org/x/text/language 0.3.5. Check the vendor advisory for mitigations.

References

• https://github.com/golang/go/issues/42536
• https://security.netapp.com/advisory/ntap-20210212-0004/
• https://github.com/golang/go/issues/42536
• https://security.netapp.com/advisory/ntap-20210212-0004/

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