Security update for nginx

Announcement ID:	SUSE-SU-2026:1761-1
Release Date:	2026-05-08T08:58:17Z
Rating:	important
References:	bsc#1257675 bsc#1260416 bsc#1260417 bsc#1260418
Cross-References:	CVE-2026-1642 CVE-2026-27654 CVE-2026-27784 CVE-2026-28753
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
Affected Products:	openSUSE Leap 15.6 Server Applications Module 15-SP7 SUSE Linux Enterprise Real Time 15 SP7 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server 15 SP6 LTSS SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves four 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 via MITM attack (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 overread or overwrite via a specially crafted MP4 file (bsc#1260417).
• CVE-2026-28753: arbitrary header injection into SMTP upstream requests via attacker-controlled DNS server (bsc#1260418).

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:

• openSUSE Leap 15.6
  zypper in -t patch SUSE-2026-1761=1
• Server Applications Module 15-SP7
  zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP7-2026-1761=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-1761=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-1761=1

Package List:

• openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64 i586)
  • nginx-debugsource-1.21.5-150600.10.15.1
  • nginx-debuginfo-1.21.5-150600.10.15.1
  • nginx-1.21.5-150600.10.15.1
• openSUSE Leap 15.6 (noarch)
  • nginx-source-1.21.5-150600.10.15.1
• Server Applications Module 15-SP7 (aarch64 ppc64le s390x x86_64)
  • nginx-debugsource-1.21.5-150600.10.15.1
  • nginx-debuginfo-1.21.5-150600.10.15.1
  • nginx-1.21.5-150600.10.15.1
• Server Applications Module 15-SP7 (noarch)
  • nginx-source-1.21.5-150600.10.15.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
  • nginx-debugsource-1.21.5-150600.10.15.1
  • nginx-debuginfo-1.21.5-150600.10.15.1
  • nginx-1.21.5-150600.10.15.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
  • nginx-source-1.21.5-150600.10.15.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
  • nginx-debugsource-1.21.5-150600.10.15.1
  • nginx-debuginfo-1.21.5-150600.10.15.1
  • nginx-1.21.5-150600.10.15.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
  • nginx-source-1.21.5-150600.10.15.1

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://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