Vulnerability Report

CVE-2026-1539

Title: Proxy Credential Leak in libsoup

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2026-1539.

CWE Category CWE-201

Published Date Jan 28, 2026

Modified Date Mar 25, 2026

Exploit Status Not Found

Score 5.8 CVSS v3.1

Exploit Probability (EPSS)

0.24%

Vulnerability Summary

CVE-2026-1539: 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.

Impacted Vendors

libsoup 1

gnome 1

Reference Links

https://access.redhat.com/security/cve/CVE-2026-1539

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

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