HTTP/2 C library and tools

Nghttp2 v1.57.0

We have released nghttp2 v1.57.0.

This release includes security advisory.

Security Advisory

CVE-2023-44487: HTTP/2 Rapid Reset

For more information, read the security advisory.


This release has a fix to mitigate CVE-2023-44487: HTTP/2 Rapid Reset. It has reasonable amount of default budgets for incoming RST_STREAM frames. Application can tune the rate limit by using nghttp2_option_set_stream_reset_rate_limit. It can also implement its own rate limit by implementing nghttp2_on_frame_recv_callback and check RST_STREAM frame.


This release fixes the bug that --single-process does not work. It also fixes the bug that TLS connection is not rate limited.