{"id":"CVE-2026-3634","title":"Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header","summary":"A flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()`…","severity":"low","cvss":3.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L","cvssSource":"cna","cwe":["CWE-93"],"vendor":"Red Hat","product":"libsoup3","affected":["libsoup3 (all versions)","libsoup","libsoup (all versions)","libsoup (all versions)","libsoup (all versions)"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-03-17T13:03:02.939035Z"},"exploitAvailable":true,"published":"2026-03-17","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:24:11.360Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-3634","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-3634"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2445129","label":"RHBZ#2445129"},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/issues/485"}],"tags":["cve.org","exploit-available"],"epss":0.00195,"epssPercentile":0.09338,"ingestedAt":"2026-11-05T19:30:42.888Z","slug":"CVE-2026-3634","body":"## Overview\n\nA flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()` function. This vulnerability allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks.\n\n## Affected\n\n- `libsoup3 (all versions)`\n- `libsoup`\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.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"twilight","depthScore":33,"depthScoreParts":{"impact":21.5,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}