sb/1.31.4-1

Changes with nginx 1.31.4                                        19 Aug 2026

    *) Feature: the "proxy_protocol" directive in the stream and mail
       modules now supports the PROXY protocol version 2.

    *) Change: now HTTP/2 and gRPC requests to backends are always sent with
       the ":authority" pseudo-header, and HTTP/1.1 requests - with the
       "Host" header.

    *) Bugfix: a segmentation fault might occur in a worker process if the
       "select" method was used.

    *) Bugfix: incomplete gRPC responses with a non-zero "Content-Length"
       header line are now treated as malformed.

    *) Bugfix: in binary compatibility with third-party modules using script
       codes; the bug had appeared in 1.31.3.

    *) Bugfix: in the ngx_http_perl_module.
       Thanks to David Carlier.

    *) Bugfixes in HTTP/2, HTTP/3, ngx_http_image_filter_module, and
       ngx_http_grpc_module.

Integration Test Suite Run Result

• Date: 2026-08-24 16:09:08 PDT
• Nginx Version: nginx version: nginx-n.wtf/1.31.4
• OpenSSL Version: OpenSSL 4.0.1 9 Jun 2026 (Library: OpenSSL 4.0.1 9 Jun 2026)
• Execution Time: 1.27s

Summary

Total Examples	Passed	Failed	Success Rate
21	20	1	95.2%

Test Results Detail

Category	Test Example	Result
HTTP & HTTPS Protocol Handshakes	HTTP/1.1 Plaintext GET (200 OK)	PASS
HTTP & HTTPS Protocol Handshakes	HTTP/1.1 SSL GET (200 OK)	PASS
HTTP & HTTPS Protocol Handshakes	HTTP/2 SSL GET (200 OK)	PASS
HTTP & HTTPS Protocol Handshakes	HTTP/3 (QUIC) GET (200 OK)	PASS
Compression & Data Integrity	Uncompressed Payload Hash Integrity	PASS
Compression & Data Integrity	Brotli Dynamic Compression & Decompress Hash Match	PASS
Compression & Data Integrity	Zstd Dynamic Compression & Decompress Hash Match	PASS
Compression & Data Integrity	Brotli Static (.br) Pre-compression Serving	PASS
Compression & Data Integrity	Zstd Static (.zst) Pre-compression Serving	PASS
Partial Content & Range 206 Responses	Uncompressed Range Request (0-499 bytes) Returns 206 & Partial Data Match	PASS
Partial Content & Range 206 Responses	Zstd Static Pre-compressed Range Request Returns 206 & 500 Bytes Slice	PASS
Partial Content & Range 206 Responses	Brotli Static Pre-compressed Range Request Returns 206 & 500 Bytes Slice	FAIL
Partial Content & Range 206 Responses	Zstd Dynamic Compression Range Request Falls Back to 200 OK (RFC Compliant)	PASS
Partial Content & Range 206 Responses	Brotli Dynamic Compression Range Request Falls Back to 200 OK (RFC Compliant)	PASS
Post-Quantum Cryptography (PQC) & TLS 1.3 (OpenSSL 4.0)	PQC Key Exchange Group Negotiation (X25519MLKEM768)	PASS
Post-Quantum Cryptography (PQC) & TLS 1.3 (OpenSSL 4.0)	TLS 1.3 Session Resumption (Session Ticket Re-use)	PASS
Compression & Encoding Negotiation	Multi-Encoding Default Priority (zstd > br > gzip)	PASS
Compression & Encoding Negotiation	Multi-Encoding q-value Filter Bypass (br;q=0 selects zstd)	PASS
Compression & Encoding Negotiation	Client q-value Preference Negotiation (zstd;q=0, br;q=1.0 selects br)	PASS
Compression & Encoding Negotiation	Vary: Accept-Encoding Header Verification	PASS
Server Metadata	Server Header Present	PASS

Failures & Diagnostics

Partial Content & Range 206 Responses - Brotli Static Pre-compressed Range Request Returns 206 & 500 Bytes Slice

Status: 200, Data Size: 1475, Headers: HTTP/1.1 200 OK | Server: nginx-n.wtf/1.31.4 | Date: Mon, 24 Aug 2026 23:09:07 GMT | Content-Type: text/plain | Content-Length: 1475 | Last-Modified: Mon, 24 Aug 2026 23:09:07 GMT | Connection: keep-alive | Vary: Accept-Encoding | ETag: "6a8ccf13-5c3" | Content-Encoding: br | Alt-Svc: h3=":8443"; ma=86400