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CVE Vulnerability Details :
CVE-2026-12547
PUBLISHED
More InfoOfficial Page
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
View Known Exploited Vulnerability (KEV) details
Published At-21 Jul, 2026 | 18:35
Updated At-21 Jul, 2026 | 19:14
Rejected At-
▼CVE Numbering Authority (CNA)
Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch

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.

Affected Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 10
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
libsoup3
CPEs
  • cpe:/o:redhat:enterprise_linux:10
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-201Insertion of Sensitive Information Into Sent Data
Type: CWE
CWE ID: CWE-201
Description: Insertion of Sensitive Information Into Sent Data
Metrics
VersionBase scoreBase severityVector
3.13.4LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N
Version: 3.1
Base score: 3.4
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N
Metrics Other Info
Red Hat severity rating
value:
Low
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds

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

Exploits
Credits
Red Hat would like to thank Cavid (Yes We Hack) for reporting this issue.
Timeline
EventDate
Reported to Red Hat.2026-06-17 18:01:37
Made public.2026-04-25 00:00:00
Event: Reported to Red Hat.
Date: 2026-06-17 18:01:37
Event: Made public.
Date: 2026-04-25 00:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://access.redhat.com/security/cve/CVE-2026-12547
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2489994
issue-tracking
x_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/506
N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-12547
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2489994
Resource:
issue-tracking
x_refsource_REDHAT
Hyperlink: https://gitlab.gnome.org/GNOME/libsoup/-/work_items/506
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found