Bug#1127905: libsoup3: CVE-2026-2443

[Salvatore Bonaccorso]

Source: libsoup3
Version: 3.6.5-9
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/issues/487
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2026-2443[0]:
| A flaw was identified in libsoup, a widely used HTTP library in
| GNOME-based systems. When processing specially crafted HTTP Range
| headers, the library may improperly validate requested byte ranges.
| In certain build configurations, this could allow a remote attacker
| to access portions of server memory beyond the intended response.
| Exploitation requires a vulnerable configuration and access to a
| server using the embedded SoupServer component.


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-2026-2443
    https://www.cve.org/CVERecord?id=CVE-2026-2443
[1] https://gitlab.gnome.org/GNOME/libsoup/-/issues/487
[2] https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/508

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore