SUSE alert openSUSE-SU-2026:20784-1 (nginx)

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null@suse.de
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openSUSE-SU-2026:20784-1: important: Security update for nginx
Date:
             
 
Mon, 25 May 2026 17:51:39 +0200
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<20260525155139.694CBFCEF@maintenance.suse.de>
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Article
openSUSE security update: security update for nginx
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20784-1
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 ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  * 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-2026-27654 ( 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 ( 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-2026-27784 ( 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 ( 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-2026-28753 ( 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 ( 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-2026-28755 ( 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 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 5 vulnerabilities and has 5 bug fixes 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 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-16.0-790=1

Package List:

- openSUSE Leap 16.0:

  nginx-1.27.2-160000.3.1
  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