CVE-2026-8458

MediumCVSS 6.5/10Last modified Sep 15, 2026

Description

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-488

Affected software

No affected versions have been published.

Timeline

Published
Jul 3, 2026
Last modified
Sep 15, 2026
NVD status
Modified

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CVE-2026-8458: Medium severity, CVSS 6.5 | Vulnix