CVE-2026-12549

MEDIUM EPSS 23.4%

Published Jun 22, 20261w ago · Modified Jun 23, 20266d ago

4.8 CVSS 3.1

Medium

Published Jun 22, 2026 1w ago

Last Modified Jun 23, 2026 6d ago

Description

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.

CVSS Details

Base Score

4.8

Exploitability

2.2

Impact

2.5

Vector string

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

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality Low

Integrity None

Availability Low

Threat Intelligence

EPSS Exploit Probability

23.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-805

References 4

access.redhat.com https://access.redhat.com/security/cve/CVE-2026-12549
access.redhat.com https://access.redhat.com/security/cve/cve-2026-0716
bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2489999
gitlab.gnome.org https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.