SUSE alert SUSE-SU-2026:21823-1 (nginx)

From:
             
 
SLE-SECURITY-UPDATES <null@suse.de>
To:
             
 
sle-security-updates@lists.suse.com
Subject:
             
 
SUSE-SU-2026:21823-1: important: Security update for nginx
Date:
             
 
Wed, 27 May 2026 12:31:22 -0000
Message-ID:
             
 
<177988508280.114.13440072138942679212@4542fd0e0e60>
# Security update for nginx

Announcement ID: SUSE-SU-2026:21823-1  
Release Date: 2026-05-19T17:20:56Z  
Rating: important  
References:

  * bsc#1257675
  * bsc#1260416
  * bsc#1260417
  * bsc#1260418
  * bsc#1260419

  
Cross-References:

  * CVE-2026-1642
  * CVE-2026-27654
  * CVE-2026-27784
  * CVE-2026-28753
  * CVE-2026-28755

  
CVSS scores:

  * CVE-2026-1642 ( SUSE ):  8.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-1642 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2026-1642 ( NVD ):  8.2

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/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-2026-1642 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2026-27654 ( SUSE ):  8.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-27654 ( SUSE ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2026-27654 ( NVD ):  8.8

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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-2026-27654 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2026-27784 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-27784 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-27784 ( NVD ):  8.5

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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-2026-27784 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-27784 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-28753 ( SUSE ):  6.3

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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-2026-28753 ( SUSE ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-28753 ( NVD ):  6.3

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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-2026-28753 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-28755 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-28755 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-28755 ( NVD ):  5.3

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/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-2026-28755 ( NVD ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-28755 ( NVD ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves five vulnerabilities can now be installed.

## Description:

This update for nginx fixes the following issues:

  * CVE-2026-1642: plain text data injection into the response from an upstream
    proxied server (bsc#1257675).
  * CVE-2026-27654: buffer overflow in the NGINX worker process via the
    `ngx_http_dav_module module` (bsc#1260416).
  * CVE-2026-27784: NGINX worker memory over-read or over-write via a specially
    crafted MP4 file (bsc#1260417).
  * CVE-2026-28753: improper handling onf CRLF sequences in CRLF responses
    allows for arbitrary header injection into SMTP upstream requests
    (bsc#1260418).
  * CVE-2026-28755: TLS handshakes can succeed with revoked certificates due to
    improper handling of such certificates by the `ngx_stream_ssl_module` module
    (bsc#1260419).

## 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-16.0-790=1

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-790=1

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * nginx-debugsource-1.27.2-160000.3.1
    * nginx-1.27.2-160000.3.1
    * nginx-debuginfo-1.27.2-160000.3.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
    * nginx-source-1.27.2-160000.3.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * nginx-debugsource-1.27.2-160000.3.1
    * nginx-1.27.2-160000.3.1
    * nginx-debuginfo-1.27.2-160000.3.1
  * SUSE Linux Enterprise Server 16.0 (noarch)
    * nginx-source-1.27.2-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-1642.html
  * https://www.suse.com/security/cve/CVE-2026-27654.html
  * https://www.suse.com/security/cve/CVE-2026-27784.html
  * https://www.suse.com/security/cve/CVE-2026-28753.html
  * https://www.suse.com/security/cve/CVE-2026-28755.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1257675
  * https://bugzilla.suse.com/show_bug.cgi?id=1260416
  * https://bugzilla.suse.com/show_bug.cgi?id=1260417
  * https://bugzilla.suse.com/show_bug.cgi?id=1260418
  * https://bugzilla.suse.com/show_bug.cgi?id=1260419



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