CVE-2026-12549
MEDIUMlibsoup SoupServer - Range Suffix Overflow Regression
Title source: manualDescription
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 (4)
Core 4
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-12549
Technical Description, X_Refsource_Redhat technical-description
x_refsource_redhat
cve-2026-0716
https://access.redhat.com/security/cve/cve-2026-0716
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2489999
https://bugzilla.redhat.com/show_bug.cgi?id=2489999
Scores
CVSS v3
4.8
EPSS
0.0032
EPSS Percentile
24.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-805
Status
published
Products (11)
gnome/libsoup
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
redhat/enterprise_linux
6.0
redhat/enterprise_linux
7.0
redhat/enterprise_linux
8.0
redhat/enterprise_linux
9.0
... and 1 more
Published
Jun 22, 2026
Tracked Since
Jun 22, 2026