Description
An issue was discovered in OpenResty before 1.15.8.4. ngx_http_lua_subrequest.c allows HTTP request smuggling, as demonstrated by the ngx.location.capture API.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nginx | 1.18.0-5 | — |
| Debian 13 | nginx | 1.18.0-5 | — |
| Debian 12 | nginx | 1.18.0-5 | — |
| Debian 10 | nginx | 1.14.2-2+deb10u3 | DSA-4750-1 |
| Debian 9 | nginx | 1.10.3-1+deb9u5 | DLA-2283-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | nginx | 1.18.0-0ubuntu1.3 | USN-5371-1 |
| Ubuntu 18.04 LTS | nginx | 1.14.0-0ubuntu1.10 | USN-5371-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | nginx | 1.10.3-0ubuntu0.16.04.5+esm4 | USN-5371-3, USN-5371-1 |
| Ubuntu Pro 14.04 LTS | nginx | No fix yet | — |
Advisories 4
- USN-5371-1 nginx vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5371-3 nginx vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4750-1 nginx - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2283-1 nginx - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/openresty/openresty/blob/4e8b4c395f842a078e429c80dd063b2323999957/patches/ngx_http_lua-0.10.15-fix_location_capture_content_length_chunked.patch
- https://github.com/openresty/lua-nginx-module/commit/9ab38e8ee35fc08a57636b1b6190dca70b0076fa
- [debian-lts-announce] 20200720 [SECURITY] [DLA 2283-1] nginx security update mailing-list
- DSA-4750 vendor-advisory
- https://security.netapp.com/advisory/ntap-20210129-0002/