SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.

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Fixes

Solution

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Workaround

If changing desktop proxy settings, close any applications using libsoup, then restart the application after the setting has been changed.

History

Tue, 21 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 21 Jul 2026 18:45:00 +0000

Type Values Removed Values Added
Description SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.
Title Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-201
CPEs cpe:/o:redhat:enterprise_linux:10
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-07-21T19:14:49.960Z

Reserved: 2026-06-17T18:09:30.319Z

Link: CVE-2026-12547

cve-icon Vulnrichment

Updated: 2026-07-21T19:03:10.203Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses