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

GO-2026-4918 · BIT-golang-2026-33814 · CVE-2026-33814

Published May 7, 2026 · Modified May 11, 2026

Description

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.

References

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

Ready to move

Start Securing

Start for Free Get Demo

Free, no credit card | First findings in minutes