Description
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_slice_module module. When the slice directive and unnamed regex captures are configured or when a background cache update happens, unauthenticated attackers can send requests that may cause uninitialized memory access in the NGINX worker process, leading to limited disclosure of memory or a restart.
Impact: This vulnerability may allow remote, unauthenticated attackers to have limited control to disclose memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: The ngx_http_slice_module module is not enabled by default; it's enabled with the --with-http_slice_module configuration parameter.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| F5 | NGINX Plus | >= 37.0.0.1, < 37.0.3.1; >= R36, < R36 P7; >= R33, < * |
| F5 | NGINX Open Source | >= 1.31.2, < 1.31.3; >= 1.15.8, < 1.30.4 |
References
- https://my.f5.com/manage/s/article/K000162100Vendor Advisory
Timeline
- Published
- Jul 15, 2026
- Last modified
- Aug 11, 2026
- NVD status
- Analyzed