Detections
Analytics
RHEL 9 : nginx (RHSA-2026:93472)
critical Nessus Plugin ID 374926
Synopsis
The remote Red Hat host is missing one or more security updates for nginx.Description
The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:93472 advisory.nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.
Security Fix(es):
* nginx: ngx_http_rewrite_module: code execution and denial of service (CVE-2026-9256)
* nginx: NGINX: Arbitrary code execution or Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers (CVE-2026-42055)
* nginx: NGINX: Heap buffer over-read allows memory modification or denial of service (CVE-2026-56434)
* nginx: NGINX: Arbitrary code execution via crafted HTTP requests (CVE-2026-42533)
* nginx: NGINX: Memory disclosure and denial of service in ngx_http_slice_module (CVE-2026-60005)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.
Solution
Update the RHEL nginx package based on the guidance in RHSA-2026:93472.See Also
https://access.redhat.com/errata/RHSA-2026:93472
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2480746
https://bugzilla.redhat.com/show_bug.cgi?id=2489866
https://bugzilla.redhat.com/show_bug.cgi?id=2500960
https://bugzilla.redhat.com/show_bug.cgi?id=2500967
Plugin Details
Severity: Critical
ID: 374926
File Name: redhat-RHSA-2026-93472.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Red Hat Local Security Checks
Published: 11/2/2026
Updated: 11/2/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.9
Percentile: 99.34
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 8.5
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C
CVSS Score Source: CVE-2026-60005
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
CVSS Score Source: CVE-2026-9256
CVSS v4
Risk Factor: Critical
Base Score: 9.2
Threat Score: 8.2
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-9256
Vulnerability Information
CPE: cpe:/o:redhat:rhel_e4s:9.2, p-cpe:/a:redhat:enterprise_linux:nginx-all-modules, p-cpe:/a:redhat:enterprise_linux:nginx-core, p-cpe:/a:redhat:enterprise_linux:nginx-filesystem, p-cpe:/a:redhat:enterprise_linux:nginx-mod-http-image-filter, p-cpe:/a:redhat:enterprise_linux:nginx-mod-http-perl, p-cpe:/a:redhat:enterprise_linux:nginx-mod-http-xslt-filter, p-cpe:/a:redhat:enterprise_linux:nginx-mod-mail, p-cpe:/a:redhat:enterprise_linux:nginx-mod-stream, p-cpe:/a:redhat:enterprise_linux:nginx
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 11/2/2026
Vulnerability Publication Date: 5/22/2026
Reference Information
CVE: CVE-2026-42055, CVE-2026-42533, CVE-2026-56434, CVE-2026-60005, CVE-2026-9256
RHSA: 2026:93472