Bug#1126548: libsoup3: CVE-2026-1467

[Salvatore Bonaccorso]

Source: libsoup3
Version: 3.6.5-7
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/issues/488
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2026-1467[0]:
| A flaw was found in libsoup, an HTTP client library. This
| vulnerability, known as CRLF (Carriage Return Line Feed) Injection,
| occurs when an HTTP proxy is configured and the library improperly
| handles URL-decoded input used to create the Host header. A remote
| attacker can exploit this by providing a specially crafted URL
| containing CRLF sequences, allowing them to inject additional HTTP
| headers or complete HTTP request bodies. This can lead to unintended
| or unauthorized HTTP requests being forwarded by the proxy,
| potentially impacting downstream services.


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-2026-1467
    https://www.cve.org/CVERecord?id=CVE-2026-1467
[1] https://gitlab.gnome.org/GNOME/libsoup/-/issues/488
[2] https://gitlab.gnome.org/GNOME/libsoup/-/commit/167ef0c6817658c1a089c75c462482209e207db4

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore