OESA-2026-2800 (CVE-2026-42055)
Vulnerability from osv_openeuler – Published: 2026-07-06 11:11 – Updated: 2026-08-06 11:11 – Source websiteNGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server.
Security Fix(es):
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.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42055)
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-48142)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"compat-nginx-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-debuginfo-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-debugsource-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-http-image-filter-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-http-perl-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-http-xslt-filter-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-mail-1.24.0-13.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-stream-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-debuginfo-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-debugsource-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-mod-devel-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-mod-http-image-filter-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-mod-http-perl-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-mod-mail-1.24.0-13.oe2403sp1.aarch64.rpm",
"nginx-mod-stream-1.24.0-13.oe2403sp1.aarch64.rpm"
],
"noarch": [
"compat-nginx-all-modules-1.24.0-13.oe2403sp1.noarch.rpm",
"compat-nginx-filesystem-1.24.0-13.oe2403sp1.noarch.rpm",
"compat-nginx-help-1.24.0-13.oe2403sp1.noarch.rpm",
"nginx-all-modules-1.24.0-13.oe2403sp1.noarch.rpm",
"nginx-filesystem-1.24.0-13.oe2403sp1.noarch.rpm",
"nginx-help-1.24.0-13.oe2403sp1.noarch.rpm"
],
"src": [
"compat-nginx-1.24.0-13.oe2403sp1.src.rpm",
"nginx-1.24.0-13.oe2403sp1.src.rpm"
],
"x86_64": [
"compat-nginx-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-debuginfo-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-debugsource-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-http-image-filter-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-http-perl-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-http-xslt-filter-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-mail-1.24.0-13.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-stream-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-debuginfo-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-debugsource-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-mod-devel-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-mod-http-image-filter-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-mod-http-perl-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-mod-mail-1.24.0-13.oe2403sp1.x86_64.rpm",
"nginx-mod-stream-1.24.0-13.oe2403sp1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP1",
"name": "nginx",
"purl": "pkg:rpm/openEuler/nginx\u0026distro=openEuler-24.03-LTS-SP1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.24.0-13.oe2403sp1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "High"
},
"details": "NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server.\r\n\r\nSecurity Fix(es):\n\nNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module\u00a0and ngx_http_grpc_module\u00a0modules. This vulnerability exists when the proxy_http_version to 2\u00a0or grpc_pass\u00a0directives are used to proxy HTTP/2 traffic, the ignore_invalid_headers\u00a0directive is set to off, and the large_client_header_buffers\u00a0directive 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. \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42055)\n\nNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module\u00a0module. When content is served or proxied through a location block with both source_charset\u00a0utf-8; and a charset\u00a0directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-48142)",
"id": "OESA-2026-2800",
"modified": "2026-08-06T11:11:43Z",
"published": "2026-07-06T11:11:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2800"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42055"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48142"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "nginx security update",
"upstream": [
"CVE-2026-42055",
"CVE-2026-48142"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
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