Description
A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the `soup_body_input_stream_read_chunked()` function by sending a malicious HTTP request. This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a non-libsoup backend server. Successful exploitation can allow an attacker to bypass security controls, poison web caches, or gain unauthorized access.
Problem types
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Product status
Timeline
| 2026-04-14: | Reported to Red Hat. |
| 2026-01-27: | Made public. |
References
gitlab.gnome.org/GNOME/libsoup/-/work_items/508
access.redhat.com/security/cve/CVE-2026-6324
bugzilla.redhat.com/show_bug.cgi?id=2458479 (RHBZ#2458479)
gitlab.gnome.org/GNOME/libsoup/-/issues/508