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SUSE Linux Enterprise Server 2026 curl Security Notice SUSE-SU-2026-31046-9

suse
Calendar Grey April 1, 2026
Dist Suse Esm H88
Critical SUSE curl update addresses multiple issues including authentication flaws and connection reuse. Protect your systems now.
An update that solves four vulnerabilities can now be installed.

Summary

## 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). * CVE-2026-3805: use after free in SMB connection reuse (bsc#1259365). ## 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 - BCI 16.0 zypper in -t patch SUSE-SLES-16.0-418=1 ## Package List: * SUSE Linux Enterprise Server - BCI 16.0 (aarch64 ppc64le s390x x86_64) * curl-debugsource-8.14.1-160000.5.1 * libcurl4-8.14.1-160000.5.1

Topics%20covered

Topics Covered

security advisory network security SuSE important authentication issue curl

References

* bsc#1259362

* bsc#1259363

* bsc#1259364

* bsc#1259365

Cross-

* CVE-2026-1965

* CVE-2026-3783

* CVE-2026-3784

* CVE-2026-3805

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20918-1
Release Date: 2026-03-20T09:36:45Z
Rating: important

Topics%20covered

Topics Covered

security advisory network security SuSE important authentication issue curl

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