Bug#1126627: libsoup3: CVE-2026-1536

[Salvatore Bonaccorso]

Source: libsoup3
Version: 3.6.5-3
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/issues/486
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2026-1536[0]:
| A flaw was found in libsoup. An attacker who can control the input
| for the Content-Disposition header can inject CRLF (Carriage Return
| Line Feed) sequences into the header value. These sequences are then
| interpreted verbatim when the HTTP request or response is
| constructed, allowing arbitrary HTTP headers to be injected. This
| vulnerability can lead to HTTP header injection or HTTP response
| splitting without requiring authentication or user interaction.


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-2026-1536
    https://www.cve.org/CVERecord?id=CVE-2026-1536
[1] https://gitlab.gnome.org/GNOME/libsoup/-/issues/486
[2] https://gitlab.gnome.org/GNOME/libsoup/-/commit/5c1a2e9c06a834eb715f60265a877f5b882cc1b1

Please adjust the affected versions in the BTS as needed.

Regards,
Salvtore