PT-2025-50606 · Gnome+3 · Libsoup+3
Published
2025-12-11
·
Updated
2026-05-15
·
CVE-2025-14523
CVSS v2.0
8.5
High
| Vector | AV:N/AC:L/Au:N/C:P/I:C/A:N |
Name of the Vulnerable Software and Affected Versions
libsoup versions 2.4 and 3.x
Description
A flaw in libsoup’s HTTP header handling allows multiple
Host: headers in a request, with the server processing the last occurrence. This discrepancy between how front proxies and the backend server handle the Host: header can lead to virtual host confusion. This can enable request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker provides duplicate Host: headers. The vulnerability arises from a host-parsing discrepancy where the first value is honored by proxies, while the backend uses the last value.
Recommendations
Update libsoup to a newer version that addresses this issue.Fix
HTTP Request/Response Smuggling
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Debian
Red Os
Rocky Linux
Libsoup