Source: libsoup3 Version: 3.6.5-5 Severity: important Tags: security upstream Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/issues/472 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for libsoup3. CVE-2025-14523[0]: | A flaw in libsoup’s HTTP header handling allows multiple Host: | headers in a request and returns the last occurrence for server-side | processing. Common front proxies often honor the first Host: header, | so this mismatch can cause vhost confusion where a proxy routes a | request to one backend but the backend interprets it as destined for | another host. This discrepancy enables request-smuggling style | attacks, cache poisoning, or bypassing host-based access controls | when an attacker supplies duplicate Host headers. 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-2025-14523 https://www.cve.org/CVERecord?id=CVE-2025-14523 [1] https://gitlab.gnome.org/GNOME/libsoup/-/issues/472 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
