CVE-2026-12547

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

21/07/2026

Last modified:

21/07/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 3.40 LOW
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

Base Score 3.x

3.40

Severity 3.x

LOW

References to Advisories, Solutions, and Tools

https://access.redhat.com/security/cve/CVE-2026-12547
https://bugzilla.redhat.com/show_bug.cgi?id=2489994
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/506