# nginx release-1.31.5

- Product: nginx (https://whatsnew.fyi/product/nginx)
- Vendor: F5
- Date: 2026-09-02
- Version: release-1.31.5
- Original notes: https://github.com/nginx/nginx/releases/tag/release-1.31.5
- Permalink: https://whatsnew.fyi/product/nginx/releases/release-1.31.5

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

- **added** — FastCGI and uWSGI support for multibyte parameter name lengths
- **added** — client_body_early_read directive
- **added** — ngx_http_json_module for JSON parsing
- **added** — Predicate locations
- **added** — NGINX Control API
- **changed** — Core channel file descriptor receive errors are now non-fatal
- **changed** — Memcached now respects the end marker in the maximum supported length
- **changed** — Slice filter now includes overflow protection in slice range requests
- **fixed** — QUIC now rejects CRYPTO frames received in 1-RTT packets
- **fixed** — Event pipe no longer frees buffers still used by the downstream
- **fixed** — JSON fixed overflow detection in length calculation

[nginx-1.31.5](https://nginx.org/en/download.html) mainline version has been released, featuring control API, predicate locations, and the ngx_http_json_module.

See official [CHANGES](https://nginx.org/en/CHANGES) on nginx.org.

Below is a release summary generated by GitHub.

##### What's Changed
* FastCGI, uWSGI: support for multibyte parameter name lengths by @VadimZhestikov in https://github.com/nginx/nginx/pull/1648
* Added client_body_early_read directive by @arut in https://github.com/nginx/nginx/pull/1641
* Added the json parser module. by @roman-f5 in https://github.com/nginx/nginx/pull/1642
* Core: make channel file descriptor receive errors non-fatal by @arut in https://github.com/nginx/nginx/pull/1662
* Memcached: respect the end marker in the maximum supported length by @VadimZhestikov in https://github.com/nginx/nginx/pull/1637
* QUIC: rejected CRYPTO frames received in 1-RTT packets by @VadimZhestikov in https://github.com/nginx/nginx/pull/1638
* Slice filter: overflow protection in slice range requests by @VadimZhestikov in https://github.com/nginx/nginx/pull/1639
* Event pipe: do not free buffers still used by the downstream by @route443 in https://github.com/nginx/nginx/pull/1664
* Predicate locations by @arut in https://github.com/nginx/nginx/pull/1633
* JSON: fixed overflow detection in length calculation by @dplotnikov-f5 in https://github.com/nginx/nginx/pull/1658
* NGINX Control API by @avahahn in https://github.com/nginx/nginx/pull/1626
* Updated OpenSSL and PCRE used for win32 builds by @arut in https://github.com/nginx/nginx/pull/1715
* nginx-1.31.5-RELEASE by @arut in https://github.com/nginx/nginx/pull/1714

##### New Contributors
* @route443 made their first contribution in https://github.com/nginx/nginx/pull/1664
* @avahahn made their first contribution in https://github.com/nginx/nginx/pull/1626

**Full Changelog**: https://github.com/nginx/nginx/compare/release-1.31.4...release-1.31.5