openSUSE-SU-2026:21439-1: important: Security update for nginx

openSUSE security update: security update for nginx
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Announcement ID: openSUSE-SU-2026:21439-1
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 ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  * 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-2026-42055 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-48142 ( SUSE ): 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

Affected Products:

         openSUSE Leap 16.0

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An update that solves 3 vulnerabilities and has 4 bug fixes 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 openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-1343=1

Package List:

- openSUSE Leap 16.0:

  nginx-1.27.2-160000.6.1
  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