CVE-2026-66339

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

6.5 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

July 24, 2026

Last Modified

July 24, 2026

CWE ID

CWE-201

Source

NVD

Vendor

Red Hat

Product

Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9

External References

https://access.redhat.com/security/cve/CVE-2026-66339
https://bugzilla.redhat.com/show_bug.cgi?id=2506951

CVE-2026-66339

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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