CVE-2026-12547

LOW

Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch

Title source: cna

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.

References (3)

Core 3

Core References

Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat

https://access.redhat.com/security/cve/CVE-2026-12547

Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat

RHBZ#2489994

https://bugzilla.redhat.com/show_bug.cgi?id=2489994

https://gitlab.gnome.org/GNOME/libsoup/-/work_items/506

Scores

CVSS v3 3.4

EPSS 0.0023

EPSS Percentile 13.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-201

Status published

Products (1)

Red Hat/Red Hat Enterprise Linux 10

Published Jul 21, 2026

Tracked Since Jul 22, 2026