{"id":"CVE-2026-6324","title":"Libsoup: libsoup: http request smuggling via unsigned to signed conversion error","summary":"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 opera…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-444"],"vendor":"Red Hat","product":"libsoup3","affected":["libsoup3 (all versions)","libsoup (all versions)","libsoup (all versions)","libsoup (all versions)","libsoup (all versions)"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-05-29T14:00:40.782194Z"},"exploitAvailable":true,"published":"2026-05-29","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:51:04.201Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-6324","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-6324"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458479","label":"RHBZ#2458479"},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/commit/96ac392b444d01bd5de1d1276b187c3ed49d048c"},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/issues/508"}],"tags":["cve.org","exploit-available"],"epss":0.00872,"epssPercentile":0.59038,"ingestedAt":"2026-11-05T19:30:42.888Z","slug":"CVE-2026-6324","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `libsoup3 (all versions)`\n- `libsoup (all versions)`\n- `libsoup (all versions)`\n- `libsoup (all versions)`\n- `libsoup (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":26.4,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[]}