The remote host is affected by the vulnerability described in GLSA-202608-16 (nginx: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in nginx. Please review the CVE identifiers referenced below     for details.

Tenable has extracted the preceding description block directly from the Gentoo Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of nginx installed on the remote host is prior to 1.30.3-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2NGINX1-2026-014 advisory.

    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)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22943-1 advisory.

    This update for nginx fixes the following issues

    - CVE-2026-40460: bypass of authorization and bypass of rate limiting when NGINX is configured to use the     HTTP/3 QUIC module (bsc#1265228).
    - CVE-2026-42055: heap-based buffer overflow in the ngx_http_proxy_v2_module and ngx_http_grpc_module     modules (bsc#1268492).
    - CVE-2026-48142: heap buffer over-read in the ngx_http_charset_module module (bsc#1268495).
    - HTTP2-BOMB denial of service (bsc#1267525).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The installed version of nginx is 0.3.50 prior to 1.30.3, or 1.31.x prior to 1.31.2. It is, therefore, affected by the following issue:

  - 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8458-1 advisory.

    It was discovered that nginx incorrectly handled large headers when proxying HTTP/2 traffic. A remote     attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly     execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability     to a denial of service. (CVE-2026-42055)

    It was discovered that nginx incorrectly handled character set conversion under certain circumstances. A     remote attacker could possibly use this issue to obtain sensitive information or cause nginx to crash,     resulting in a denial of service. (CVE-2026-48142)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-9d7328702e advisory.

    nginx-mod-headers-more:

    - Rebuild for 1.30.3

    nginx-mod-brotli:

    - Rebuild for 1.30.3

    nginx-mod-vts:

    - Rebuild for 1.30.3

    nginx-mod-modsecurity:

    - Rebuild for 1.30.3

    nginx-mod-fancyindex:

    - Rebuild for 1.30.3

    nginx-mod-naxsi:

    - Rebuild for 1.30.3

    nginx:

    - update to 1.30.3
    - fixes CVE-2026-42055, CVE-2026-42530 and CVE-2026-48142




Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6374 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6374-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     June 30, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : nginx     CVE ID         : CVE-2026-42055 CVE-2026-48142     Debian Bug     : 1140359 1140361

    Multiple vulnerabilities were discoverd in Nginx, a high-performance web     and reverse proxy server, which could result in remote code execution,     denial of service or memory disclosure.

    For the stable distribution (trixie), these problems have been fixed in     version 1.26.3-3+deb13u7.

    We recommend that you upgrade your nginx packages.

    For the detailed security status of nginx please refer to its security     tracker page at:
    https://security-tracker.debian.org/tracker/nginx

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4660 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4660-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/          Carlos Henrique Lima Melara     June 30, 2026                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : nginx     Version        : 1.18.0-6.1+deb11u8     CVE ID         : CVE-2026-42055 CVE-2026-48142     Debian Bug     : 1138794 1140359 1140361

    Multiple vulnerabilities were discoverd in Nginx, a high-performance web     and reverse proxy server, which could result in remote code execution,     denial of service or memory disclosure.

    CVE-2026-42055

        NGINX Open Source has 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.

    CVE-2026-48142

       NGINX Open Source has 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.

    No CVE assigned yet

        HTTP/2 Bomb denial of service

    For Debian 11 bullseye, these problems have been fixed in version     1.18.0-6.1+deb11u8.

    We recommend that you upgrade your nginx packages.

    For the detailed security status of nginx please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/nginx

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1922 advisory.

    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)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the nginx package has been released.

ID	Name	Product	Family	Published	Updated	Severity
337633	GLSA-202608-16 : nginx: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	8/18/2026	8/19/2026	critical
325580	Amazon Linux 2 : nginx, --advisory ALAS2NGINX1-2026-014 (ALASNGINX1-2026-014)	Nessus	Amazon Linux Local Security Checks	7/8/2026	7/8/2026	critical
330535	SUSE SLES16 Security Update : nginx (SUSE-SU-2026:22943-1)	Nessus	SuSE Local Security Checks	7/29/2026	7/29/2026	critical
321915	nginx 0.3.50 < 1.30.3 / 1.31.x < 1.31.2 Buffer Overread in ngx_http_charset_module	Nessus	Web Servers	6/22/2026	7/17/2026	medium
322264	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : nginx vulnerabilities (USN-8458-1)	Nessus	Ubuntu Local Security Checks	6/23/2026	6/23/2026	critical
323138	Fedora 43 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2026-9d7328702e)	Nessus	Fedora Local Security Checks	6/26/2026	6/26/2026	critical
323987	Debian dsa-6374 : libnginx-mod-http-geoip - security update	Nessus	Debian Local Security Checks	6/30/2026	6/30/2026	critical
324046	Debian dla-4660 : libnginx-mod-http-auth-pam - security update	Nessus	Debian Local Security Checks	7/1/2026	7/1/2026	critical
327392	Amazon Linux 2023 : nginx, nginx-all-modules, nginx-core (ALAS2023-2026-1922)	Nessus	Amazon Linux Local Security Checks	7/16/2026	7/16/2026	critical
334075	Photon OS 5.0: Nginx PHSA-2026-5.0-92-0935	Nessus	PhotonOS Local Security Checks	8/10/2026	8/12/2026	critical

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