Insufficiently Protected Credentials Affecting libcurl4 package, versions <8.14.1-150400.5.83.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.52% (40th percentile)

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  • Snyk IDSNYK-SLES154-LIBCURL4-16478836
  • published7 May 2026
  • disclosed6 May 2026

Introduced: 6 May 2026

CVE-2026-6253  (opens in a new tab)
CWE-522  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 libcurl4 to version 8.14.1-150400.5.83.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl4 package and not the libcurl4 package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

curl might erroneously pass on credentials for a first proxy to a second proxy.

This can happen when the following conditions are true:

  1. curl is setup to use specific different proxies for different URL schemes
  2. the first proxy needs credentials
  3. the second proxy uses no credentials
  4. while using the first proxy (using say http://), curl is asked to follow a redirect to a URL using another scheme (say https://), accessed using a second, different, proxy

CVSS Base Scores

version 3.1