CVE-2026-56434
EUVD-2026-4468415.07.2026, 15:16
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process. Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| f5 | nginx_gateway_fabric | 1.3.0 ≤ 𝑥 ≤ 1.6.2 |
| f5 | nginx_gateway_fabric | 2.0.0 ≤ 𝑥 < 2.6.7 |
| f5 | nginx_ingress_controller | 3.5.0 ≤ 𝑥 ≤ 3.7.2 |
| f5 | nginx_ingress_controller | 5.0.0 ≤ 𝑥 < 5.5.3 |
| f5 | nginx_ingress_controller | 2026-lts-r1 ≤ 𝑥 < 2026-lts-r4 |
| f5 | nginx_ingress_controller | 4.0.0 |
| f5 | nginx_ingress_controller | 4.0.1 |
| f5 | nginx_plus | 37.0.0.1 ≤ 𝑥 < 37.0.3.1 |
| f5 | nginx_plus | r33 ≤ 𝑥 < r36 |
| f5 | waf | 4.11.0 ≤ 𝑥 ≤ 4.16.0 |
| f5 | waf | 5.2.0 ≤ 𝑥 ≤ 5.8.0 |
| f5 | waf | 5.9.0 ≤ 𝑥 < 5.13.4 |
𝑥
= Vulnerable software versions
Debian Releases
Ubuntu Releases
Red Hat Enterprise Linux Releases
Red Hat Product | |||
|---|---|---|---|
| nginx |
| ||
| nginx-all-modules |
| ||
| nginx-core |
| ||
| nginx-filesystem |
| ||
| nginx-mod-devel |
| ||
| nginx-mod-http-image-filter |
| ||
| nginx-mod-http-perl |
| ||
| nginx-mod-http-xslt-filter |
| ||
| nginx-mod-mail |
| ||
| nginx-mod-stream |
|
Amazon Linux Releases
Amazon Package | |||
|---|---|---|---|
| nginx |
| ||
| nginx-all-modules |
| ||
| nginx-core |
| ||
| nginx-core-debuginfo |
| ||
| nginx-debuginfo |
| ||
| nginx-debugsource |
| ||
| nginx-filesystem |
| ||
| nginx-mod-devel |
| ||
| nginx-mod-http-image-filter |
| ||
| nginx-mod-http-image-filter-debuginfo |
| ||
| nginx-mod-http-perl |
| ||
| nginx-mod-http-perl-debuginfo |
| ||
| nginx-mod-http-xslt-filter |
| ||
| nginx-mod-http-xslt-filter-debuginfo |
| ||
| nginx-mod-mail |
| ||
| nginx-mod-mail-debuginfo |
| ||
| nginx-mod-stream |
| ||
| nginx-mod-stream-debuginfo |
|
Common Weakness Enumeration
Vulnerability Media Exposure