HTTP Request Smuggling Affecting libsoup package, versions [0,]
Threat Intelligence
This vulnerability is trending on Twitter; this may indicate a growing threat.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-CONAN-LIBSOUP-15952186
- published9 Apr 2026
- disclosed11 Dec 2025
- creditUnknown
Introduced: 11 Dec 2025
CVE-2025-14523 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the soup_message_headers_get_one_common is used to construct the request URI. An attacker can bypass host-based access controls or poison caches by sending requests with multiple Host headers, exploiting the difference in how proxies and the backend interpret these headers.
Note:
This is only exploitable if the application is deployed behind a front proxy that processes the first Host header while the backend processes the last.