CVE-2026-12549

The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding.
References
Link Resource
https://access.redhat.com/security/cve/CVE-2026-12549 Vendor Advisory Mitigation
https://access.redhat.com/security/cve/cve-2026-0716 Vendor Advisory Mitigation
https://bugzilla.redhat.com/show_bug.cgi?id=2489999 Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516 Exploit Issue Tracking Patch Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:*

History

08 Jul 2026, 15:10

Type Values Removed Values Added
First Time Gnome libsoup
Gnome
Redhat enterprise Linux
Redhat
CPE cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
References () https://access.redhat.com/security/cve/CVE-2026-12549 - () https://access.redhat.com/security/cve/CVE-2026-12549 - Vendor Advisory, Mitigation
References () https://access.redhat.com/security/cve/cve-2026-0716 - () https://access.redhat.com/security/cve/cve-2026-0716 - Vendor Advisory, Mitigation
References () https://bugzilla.redhat.com/show_bug.cgi?id=2489999 - () https://bugzilla.redhat.com/show_bug.cgi?id=2489999 - Issue Tracking, Vendor Advisory
References () https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516 - () https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516 - Exploit, Issue Tracking, Patch, Vendor Advisory

22 Jun 2026, 16:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-06-22 16:16

Updated : 2026-07-08 15:10


NVD link : CVE-2026-12549

Mitre link : CVE-2026-12549

CVE.ORG link : CVE-2026-12549


JSON object : View

Products Affected

gnome

  • libsoup

redhat

  • enterprise_linux
CWE
CWE-805

Buffer Access with Incorrect Length Value