openSUSE Curl Important Security Update Credential Leak 2026-1940-1
suse
May 18, 2026
An update that solves six vulnerabilities can now be installed.
Summary
## This update for curl fixes the following issues: 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). ## 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
Topics Covered
References
* bsc#1259362
* bsc#1262631
* bsc#1262632
* bsc#1262635
* bsc#1262636
* bsc#1262638
Cross-
* CVE-2026-1965
* CVE-2026-4873
* CVE-2026-5545
* CVE-2026-6253
* CVE-2026-6276
* CVE-2026-6429
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-2026-4873 ( SUSE ): 6.3
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
* CVE-2026-4873 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-4873 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
* CVE-2026-5545 ( SUSE ): 8.3
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Severity
important
Lowest
Low
Medium
High
Critical
Announcement ID: SUSE-SU-2026:1940-1
Release Date: 2026-05-18T07:44:21Z
Rating: important
Topics Covered
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