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SUSE SLES15 Security Update : curl (SUSE-SU-2026:1940-1)

medium Nessus Plugin ID 315269

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1940-1 advisory.

 Security issues fixed:

 - CVE-2026-4873: connection reuse ignores TLS requirement (bsc#1262631).
 - CVE-2026-5545: wrong reuse of HTTP Negotiate connection (bsc#1262632).
 - CVE-2026-6253: proxy credentials leak over redirect-to proxy (bsc#1262635).
 - CVE-2026-6276: stale custom cookie host causes cookie leak (bsc#1262636).
 - CVE-2026-6429: netrc credential leak with reused proxy connection (bsc#1262638).

 Other updates and bugfixes:

 - sws: prevent 'connection monitor' to say disconnect twice (bsc#1259362).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected curl, libcurl-devel, libcurl4 and / or libcurl4-32bit packages.

See Also

https://bugzilla.suse.com/1259362

https://bugzilla.suse.com/1262631

https://bugzilla.suse.com/1262632

https://bugzilla.suse.com/1262635

https://bugzilla.suse.com/1262636

https://bugzilla.suse.com/1262638

https://lists.suse.com/pipermail/sle-updates/2026-May/046543.html

https://www.suse.com/security/cve/CVE-2026-1965

https://www.suse.com/security/cve/CVE-2026-4873

https://www.suse.com/security/cve/CVE-2026-5545

https://www.suse.com/security/cve/CVE-2026-6253

https://www.suse.com/security/cve/CVE-2026-6276

https://www.suse.com/security/cve/CVE-2026-6429

Plugin Details

Severity: Medium

ID: 315269

File Name: suse_SU-2026-1940-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/19/2026

Updated: 5/19/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:C/A:N

CVSS Score Source: CVE-2026-5545

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:curl, p-cpe:/a:novell:suse_linux:libcurl4, p-cpe:/a:novell:suse_linux:libcurl4-32bit, p-cpe:/a:novell:suse_linux:libcurl-devel, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/18/2026

Vulnerability Publication Date: 3/11/2026

Reference Information

CVE: CVE-2026-1965, CVE-2026-4873, CVE-2026-5545, CVE-2026-6253, CVE-2026-6276, CVE-2026-6429

IAVA: 2026-A-0237-S, 2026-A-0397

SuSE: SUSE-SU-2026:1940-1