Insufficiently Protected Credentials Affecting libcurl package, versions <0:8.12.1-4.el10_2.7


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.72% (53rd percentile)

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  • Snyk IDSNYK-ALMALINUX10-LIBCURL-20935424
  • published14 Oct 2026
  • disclosed12 Oct 2026

Introduced: 12 Oct 2026

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

How to fix?

Upgrade AlmaLinux:10 libcurl to version 0:8.12.1-4.el10_2.7 or higher.
This issue was patched in ALSA-2026:80512.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 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