SUSE-SU-2026:22943-1: important: Security update for nginx

[SLE-SECURITY-UPDATES]

# Security update for nginx

Announcement ID: SUSE-SU-2026:22943-1  
Release Date: 2026-07-24T07:40:23Z  
Rating: important  
References:

  * bsc#1265228
  * bsc#1267525
  * bsc#1268492
  * bsc#1268495

  
Cross-References:

  * CVE-2026-40460
  * CVE-2026-42055
  * CVE-2026-48142

  
CVSS scores:

  * CVE-2026-40460 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-40460 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-40460 ( NVD ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-40460 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-42055 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-42055 ( NVD ):  9.2
    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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-42055 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-42055 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-48142 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-48142 ( NVD ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-48142 ( NVD ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

  
Affected Products:

  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves three vulnerabilities and has one fix can now be
installed.

## Description:

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).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1343=1

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * nginx-debugsource-1.27.2-160000.6.1
    * nginx-1.27.2-160000.6.1
    * nginx-debuginfo-1.27.2-160000.6.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
    * nginx-source-1.27.2-160000.6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-40460.html
  * https://www.suse.com/security/cve/CVE-2026-42055.html
  * https://www.suse.com/security/cve/CVE-2026-48142.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1265228
  * https://bugzilla.suse.com/show_bug.cgi?id=1267525
  * https://bugzilla.suse.com/show_bug.cgi?id=1268492
  * https://bugzilla.suse.com/show_bug.cgi?id=1268495

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