Detections
Analytics
CVE-2026-2708
high
Description
A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. 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.
References
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/513
https://gitlab.gnome.org/GNOME/libsoup/-/issues/500