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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libsoup3: CVE-2026-12549
Message-ID: <178264961143.3238643.4537889165406139615.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0+nmu1
Date: Sun, 28 Jun 2026 14:26:51 +0200
Delivered-To: submit@bugs.debian.org

Source: libsoup3
Version: 3.6.6-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2026-12549[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-12549
    https://www.cve.org/CVERecord?id=CVE-2026-12549
[1] https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]