MEDIUM5.4

GO-2024-2610

Errors returned from JSON marshaling may break template escaping in html/template

Quick fix

GO-2024-2610 — stdlib: upgrade to the fixed version with the command below.

go get stdlib@v1.21.8

Details

If errors returned from MarshalJSON methods contain user controlled data, they may be used to break the contextual auto-escaping behavior of the html/template package, allowing for subsequent actions to inject unexpected content into templates.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/stdlib

Introduced in: 0Fixed in: 1.21.8

Fixgo get stdlib@v1.21.8

References

https://go.dev/issue/65697[REPORT]
https://go.dev/cl/564196[FIX]
https://groups.google.com/g/golang-announce/c/5pwGVUPoMbg[WEB]