CVE-2026-42055
Gravedad CVSS v4.0:
CRÍTICA
Tipo:
CWE-122
Desbordamiento de búfer basado en memoria dinámica (Heap)
Fecha de publicación:
17/06/2026
Última modificación:
28/07/2026
Descripción
*** Pendiente de traducción *** NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module and ngx_http_grpc_module modules. This vulnerability exists when the proxy_http_version to 2 or grpc_pass directives are used to proxy HTTP/2 traffic, the ignore_invalid_headers directive is set to off, and the large_client_header_buffers directive size is larger than 2 megabytes. A remote, unauthenticated attacker, along with conditions beyond their control, could send large headers while creating an upstream request. This may cause a heap-based buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. <br />
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Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Impacto
Puntuación base 4.0
9.20
Gravedad 4.0
CRÍTICA
Puntuación base 3.x
8.10
Gravedad 3.x
ALTA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:f5:dos:4.9.0:*:*:*:*:nginx:*:* | ||
| cpe:2.3:a:f5:nginx_app_protect_dos:*:*:*:*:*:*:*:* | 4.3.0 (incluyendo) | 4.7.0 (incluyendo) |
| cpe:2.3:a:f5:nginx_app_protect_waf:*:*:*:*:*:*:*:* | 4.10.0 (incluyendo) | 4.16.0 (incluyendo) |
| cpe:2.3:a:f5:nginx_app_protect_waf:*:*:*:*:*:*:*:* | 5.2.0 (incluyendo) | 5.8.0 (incluyendo) |
| cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:* | 1.3.0 (incluyendo) | 1.6.2 (incluyendo) |
| cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:* | 2.0.0 (incluyendo) | 2.6.4 (excluyendo) |
| cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:* | 3.5.0 (incluyendo) | 3.7.2 (incluyendo) |
| cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:* | 5.0.0 (incluyendo) | 5.5.1 (excluyendo) |
| cpe:2.3:a:f5:nginx_ingress_controller:4.0.0:*:*:*:*:*:*:* | ||
| cpe:2.3:a:f5:nginx_ingress_controller:4.0.1:*:*:*:*:*:*:* | ||
| cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:* | 2.17.0 (incluyendo) | 2.22.0 (incluyendo) |
| cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* | 1.30.0 (incluyendo) | 1.30.3 (excluyendo) |
| cpe:2.3:a:f5:nginx_open_source:1.31.1:*:*:*:*:*:*:* | ||
| cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:* | 37.0.0 (incluyendo) | 37.0.1 (incluyendo) |
| cpe:2.3:a:f5:nginx_plus:r3:*:*:*:*:*:*:* |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página
Referencias a soluciones, herramientas e información
- https://my.f5.com/manage/s/article/K000161584
- https://access.redhat.com/errata/RHSA-2026:27197
- https://access.redhat.com/errata/RHSA-2026:36331
- https://access.redhat.com/errata/RHSA-2026:36364
- https://access.redhat.com/errata/RHSA-2026:36618
- https://access.redhat.com/errata/RHSA-2026:36639
- https://access.redhat.com/errata/RHSA-2026:38847
- https://access.redhat.com/errata/RHSA-2026:44481
- https://access.redhat.com/errata/RHSA-2026:46836
- https://access.redhat.com/security/cve/CVE-2026-42055
- https://bugzilla.redhat.com/show_bug.cgi?id=2489866
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42055.json



