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GO-2026-4918

Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

Quick fix

GO-2026-4918 — golang.org/x/net: upgrade to the fixed version with the command below.

go get golang.org/x/net@v0.53.0

Details

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go / golang.org/x/net

Introduced in: 0 Fixed in: 0.53.0

Fix go get golang.org/x/net@v0.53.0

Go / stdlib

Introduced in: 0 Fixed in: 1.25.10

Fix go get stdlib@v1.25.10

References

https://go.dev/cl/761581 [FIX]
https://go.dev/cl/761640 [FIX]
https://go.dev/issue/78476 [REPORT]
https://groups.google.com/g/golang-announce/c/qcCIEXso47M [WEB]