OESA-2026-2510 (CVE-2026-40701)

Vulnerability from osv_openeuler – Published: 2026-05-29 11:11 – Updated: 2026-08-06 11:11 – Source website
VLAI
Summary
nginx security update
Details

NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server.

Security Fix(es):

NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-40701)

NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' 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-2026-42934)

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, for systems with Address Space Layout Randomization (ASLR ) disabled, code execution is possible.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42945)

A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42946)

Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
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{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "compat-nginx-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-debuginfo-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-debugsource-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-mod-http-image-filter-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-mod-http-perl-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-mod-http-xslt-filter-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-mod-mail-1.24.0-10.oe2403sp1.aarch64.rpm",
          "compat-nginx-mod-stream-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-debuginfo-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-debugsource-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-mod-devel-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-mod-http-image-filter-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-mod-http-perl-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-mod-http-xslt-filter-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-mod-mail-1.24.0-10.oe2403sp1.aarch64.rpm",
          "nginx-mod-stream-1.24.0-10.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "compat-nginx-all-modules-1.24.0-10.oe2403sp1.noarch.rpm",
          "compat-nginx-filesystem-1.24.0-10.oe2403sp1.noarch.rpm",
          "compat-nginx-help-1.24.0-10.oe2403sp1.noarch.rpm",
          "nginx-all-modules-1.24.0-10.oe2403sp1.noarch.rpm",
          "nginx-filesystem-1.24.0-10.oe2403sp1.noarch.rpm",
          "nginx-help-1.24.0-10.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "compat-nginx-1.24.0-10.oe2403sp1.src.rpm",
          "nginx-1.24.0-10.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "compat-nginx-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-debuginfo-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-debugsource-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-mod-http-image-filter-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-mod-http-perl-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-mod-http-xslt-filter-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-mod-mail-1.24.0-10.oe2403sp1.x86_64.rpm",
          "compat-nginx-mod-stream-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-debuginfo-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-debugsource-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-mod-devel-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-mod-http-image-filter-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-mod-http-perl-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-mod-http-xslt-filter-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-mod-mail-1.24.0-10.oe2403sp1.x86_64.rpm",
          "nginx-mod-stream-1.24.0-10.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": "1.24.0-10.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 Open Source have a vulnerability in the ngx_http_ssl_module\u00a0module when the ssl_verify_client\u00a0directive is set to \u0026quot;on\u0026quot; or \u0026quot;optional,\u0026quot; and the ssl_ocsp\u00a0directive is set to \u0026quot;on\u0026quot; or the leaf\u00a0parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-40701)\n\nNGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map\u00a0and proxy_pass\u00a0with disabled buffering (\u0026quot;off\u0026quot;) directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers\u0026apos; control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42934)\n\nNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module\u00a0module. This vulnerability exists when the rewrite\u00a0directive is followed by a rewrite, if, or set\u00a0directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, for systems with Address Space Layout Randomization (ASLR ) disabled, code execution is possible.\u00a0 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42945)\n\nA vulnerability exists in the ngx_http_scgi_module\u00a0and ngx_http_uwsgi_module\u00a0modules that may result in excessive memory allocation or an over-read of data. When scgi_pass\u00a0or uwsgi_pass\u00a0is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.\u00a0 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42946)",
  "id": "OESA-2026-2510",
  "modified": "2026-08-06T11:11:27Z",
  "published": "2026-05-29T11:11:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2510"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40701"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42934"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42945"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42946"
    }
  ],
  "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-2026-40701",
    "CVE-2026-42934",
    "CVE-2026-42945",
    "CVE-2026-42946"
  ]
}



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