VULNERABILITY INTELLIGENCE

CVE-2026-66339

CVSS score6.5 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-07-24
Last modified2026-08-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Description

A flaw was found in libsoup. After a CONNECT tunnel is established through an HTTP proxy, libsoup incorrectly attaches the Proxy-Authorization header to subsequent HTTPS requests sent through that tunnel to the destination server. This allows the destination server to capture proxy credentials, leading to information disclosure.

Weakness classification

  • secalert@redhat.com: CWE-201

Primary references