HTTP Request Smuggling Affecting libsoup package, versions [,3.7.1)
Threat Intelligence
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.
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Test your applications- Snyk IDSNYK-UNMANAGED-LIBSOUP-15325664
- published22 Feb 2026
- disclosed18 Feb 2026
- creditUnknown
Introduced: 18 Feb 2026
CVE-2026-2708 (opens in a new tab)How to fix?
Upgrade libsoup to version 3.7.1 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the soup_message_headers_append_common function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.