CVE-2026-1539 MEDIUM

CVE-2026-1539: Libsoup: libsoup: credential leakage via http redirects

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-201
Published January 28, 2026
Last update March 25, 2026

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in the libsoup HTTP library that can cause proxy authentication credentials to be sent to unintended destinations. When handling HTTP redirects, libsoup removes the Authorization header but does not remove the Proxy-Authorization header if the request is redirected to a different host. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data.

Key dates

02Disclosure timeline

January 28, 2026 CVE published
March 25, 2026 Record updated