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SUSE Curl Important Credential Leak and TLS Issues Advisory 2026-1717-1

suse
Calendar Grey May 6, 2026
Dist Suse Esm H88
Update available for curl on SUSE to address critical credential leaks and TLS issues with six vulnerabilities fixed.
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:

Topics%20covered

Topics Covered

security advisory SuSE important curl credential leak tls issue

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-2026-5545 ( SUSE ): 8.3

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1717-1
Release Date: 2026-05-06T12:14:02Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important curl credential leak tls issue

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