SUSE-SU-2026:2651-1: important: Security update for haproxy

SLE-UPDATES null at suse.de
Fri Jun 26 20:33:07 UTC 2026 

# Security update for haproxy

Announcement ID: SUSE-SU-2026:2651-1  
Release Date: 2026-06-26T12:18:44Z  
Rating: important  
References:

  * bsc#1268557
  * bsc#1268558

  
Cross-References:

  * CVE-2026-55203
  * CVE-2026-55204

  
CVSS scores:

  * CVE-2026-55203 ( SUSE ):  5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-55203 ( NVD ):  9.0
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/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-2026-55203 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
  * CVE-2026-55203 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
  * CVE-2026-55204 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-55204 ( NVD ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-2026-55204 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * openSUSE Leap 15.4
  * SUSE Linux Enterprise High Availability Extension 15 SP4
  * SUSE Linux Enterprise High Availability Extension 15 SP5
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Micro 5.5
  * SUSE Linux Enterprise Micro for Rancher 5.3
  * SUSE Linux Enterprise Micro for Rancher 5.4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5
  * SUSE Manager Proxy 4.3
  * SUSE Manager Retail Branch Server 4.3
  * SUSE Manager Server 4.3

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for haproxy fixes the following issues

  * CVE-2026-55203: integer overflow vulnerability in the fcgi_conn structure's
    drl field that allows buffer misparse as new FCGI record headers
    (bsc#1268557).
  * CVE-2026-55204: null pointer dereference vulnerability in hpack_dht_insert()
    within src/hpack-tbl.c (bsc#1268558).

## 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 Micro 5.5  
    zypper in -t patch SUSE-SLE-Micro-5.5-2026-2651=1

  * SUSE Linux Enterprise Micro for Rancher 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-2651=1

  * SUSE Linux Enterprise Micro 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-2651=1

  * SUSE Linux Enterprise High Availability Extension 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HA-15-SP5-2026-2651=1

  * SUSE Linux Enterprise High Availability Extension 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HA-15-SP4-2026-2651=1

  * SUSE Linux Enterprise Micro for Rancher 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-2651=1

  * SUSE Linux Enterprise Micro 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-2651=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-2651=1

## Package List:

  * SUSE Linux Enterprise High Availability Extension 15 SP4 (aarch64 ppc64le
    s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * SUSE Linux Enterprise High Availability Extension 15 SP5 (aarch64 ppc64le
    s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1
  * SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
    * haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debuginfo-2.4.22+git0.f8e3218e2-150400.3.28.1
    * haproxy-debugsource-2.4.22+git0.f8e3218e2-150400.3.28.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-55203.html
  * https://www.suse.com/security/cve/CVE-2026-55204.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1268557
  * https://bugzilla.suse.com/show_bug.cgi?id=1268558

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