CVE-2026-66339

Published: Lug 25, 2026 Last Modified: Lug 25, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

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.

201

Insertion of Sensitive Information Into Sent Data

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality
Potential Impacts:
Read Files Or Directories Read Memory Read Application Data
Applicable Platforms
All platforms may be affected
View CWE Details
https://access.redhat.com/security/cve/CVE-2026-66339
https://access.redhat.com/security/cve/CVE-2026-66339
https://bugzilla.redhat.com/show_bug.cgi?id=2506951
https://bugzilla.redhat.com/show_bug.cgi?id=2506951