Information Exposure Affecting curl package, versions *


Severity

Recommended
low

Based on CentOS security rating.

Threat Intelligence

EPSS
0.68% (53rd percentile)

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  • Snyk IDSNYK-CENTOS6-CURL-21974268
  • published30 Oct 2026
  • disclosed14 Oct 2026

Introduced: 14 Oct 2026

NewCVE-2026-86414  (opens in a new tab)
CWE-201  (opens in a new tab)

How to fix?

There is no fixed version for Centos:6 curl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

An HTTP proxy can trick libcurl into sending the origin's credentials (Basic password, or a Negotiate/Kerberos ticket) to the proxy itself, by answering the CONNECT tunnel request with 401 WWW-Authenticate: instead of the expected 407 Proxy-Authenticate:.

CVSS Base Scores

version 3.1