CVE-2026-56434
NGINX ngx_http_ssi_module vulnerability
En bref
- Source
- NVD
- EPSS
- EPSS 0.42 % · centile 36 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- f5
- Statut NVD
- Analyzed
Description
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.
Faiblesses (CWE)
- CWE-416 — Utilisation après libération
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H | f5 |
| CVSS 4.0 | HIGH 8.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N | f5 |
| CVSS 4.0 | HIGH 8.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · f5sirt@f5.com (Secondary) |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H | NVD · f5sirt@f5.com (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-44684
- GCVE · GCVE-0-2026-56434
Avis du CERT-FR
- CERTFR-2026-AVI-0894 — Multiples vulnérabilités dans les produits F5 · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*≥ 1.3.0 ≤ 1.6.2cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*≥ 2.0.0 < 2.6.7cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:continuous_releases:*:*:*≥ 3.5.0 ≤ 3.7.2cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:continuous_releases:*:*:*≥ 5.0.0 < 5.5.3cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:long-term_support:*:*:*≥ 2026-lts-r1 < 2026-lts-r4cpe:2.3:a:f5:nginx_ingress_controller:4.0.0:*:*:*:continuous_releases:*:*:*cpe:2.3:a:f5:nginx_ingress_controller:4.0.1:*:*:*:continuous_releases:*:*:*cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*≥ 37.0.0.1 < 37.0.3.1cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*≥ r33 < r36cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:r36:p2:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:r36:p3:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:r36:p4:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:r36:p5:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:r36:p6:*:*:*:*:*:*cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*≥ 4.11.0 ≤ 4.16.0cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*≥ 5.2.0 ≤ 5.8.0cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*≥ 5.9.0 < 5.13.4
Produits affectés
| Produit | Versions |
|---|---|
| F5 · NGINX Plus | affected 37.0.0.1 < 37.0.3.1 ; affected R36 < R36 P7 ; affected R33 < * |
| F5 · NGINX Open Source | affected 1.31.2 < 1.31.3 ; affected 0.8.11 < 1.30.4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |