SUSE-SU-2026:0921-1: important: Security update for curl

[SLE-SECURITY-UPDATES]

# Security update for curl

Announcement ID: SUSE-SU-2026:0921-1  
Release Date: 2026-03-18T08:52:08Z  
Rating: important  
References:

  * bsc#1259362
  * bsc#1259363
  * bsc#1259364

  
Cross-References:

  * CVE-2026-1965
  * CVE-2026-3783
  * CVE-2026-3784

  
CVSS scores:

  * CVE-2026-1965 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
  * CVE-2026-1965 ( SUSE ):  7.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-1965 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
  * CVE-2026-3783 ( SUSE ):  5.6
    CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-3783 ( SUSE ):  4.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
  * CVE-2026-3783 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-3784 ( SUSE ):  1.0
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
  * CVE-2026-3784 ( SUSE ):  4.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-3784 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for curl fixes the following issues:

  * CVE-2026-1965: bad reuse of HTTP Negotiate connection (bsc#1259362).
  * CVE-2026-3783: token leak with redirect and netrc (bsc#1259363).
  * CVE-2026-3784: wrong proxy connection reuse with credentials (bsc#1259364).

## 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 12 SP5 LTSS  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-921=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-921=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * curl-debugsource-8.0.1-11.120.1
    * curl-debuginfo-8.0.1-11.120.1
    * libcurl-devel-8.0.1-11.120.1
    * libcurl4-8.0.1-11.120.1
    * curl-8.0.1-11.120.1
    * libcurl4-debuginfo-8.0.1-11.120.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS (s390x x86_64)
    * libcurl4-32bit-8.0.1-11.120.1
    * libcurl4-debuginfo-32bit-8.0.1-11.120.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * libcurl4-debuginfo-32bit-8.0.1-11.120.1
    * curl-debugsource-8.0.1-11.120.1
    * libcurl4-32bit-8.0.1-11.120.1
    * curl-debuginfo-8.0.1-11.120.1
    * libcurl-devel-8.0.1-11.120.1
    * libcurl4-8.0.1-11.120.1
    * curl-8.0.1-11.120.1
    * libcurl4-debuginfo-8.0.1-11.120.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-1965.html
  * https://www.suse.com/security/cve/CVE-2026-3783.html
  * https://www.suse.com/security/cve/CVE-2026-3784.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1259362
  * https://bugzilla.suse.com/show_bug.cgi?id=1259363
  * https://bugzilla.suse.com/show_bug.cgi?id=1259364

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