CVE-2026-8458 Affecting libcurl package, versions <0:8.12.1-4.el10_2.6


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.37% (31st percentile)

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  • Snyk IDSNYK-ALMALINUX10-LIBCURL-20056579
  • published23 Sept 2026
  • disclosed21 Sept 2026

Introduced: 21 Sep 2026

NewCVE-2026-8458  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 libcurl to version 0:8.12.1-4.el10_2.6 or higher.
This issue was patched in ALSA-2026:69125.

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.

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different "services".

libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead.

When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services.

CVSS Base Scores

version 3.1