PT-2026-64428 · Libsoup · Libsoup

CVE-2026-66339

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Published

2026-07-24

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Updated

2026-07-27

CVSS v3.1

6.5

Medium

VectorAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Name of the Vulnerable Software and Affected Versions libsoup (affected versions not specified)
Description A flaw exists where libsoup incorrectly attaches the Proxy-Authorization header to HTTPS requests sent through a CONNECT tunnel established via an HTTP proxy. This behavior allows the destination server to capture proxy credentials, resulting in information disclosure.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

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Weakness Enumeration

CWE-201

Related Identifiers

AZL-94098
CVE-2026-66339
ECHO-3341-E81D-BF5B

Affected Products

Libsoup