{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"libsoup","product":"Red Hat Enterprise Linux 6","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"libsoup","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"libsoup","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"libsoup","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-66337","cwes":["CWE-125"],"description":"A flaw was found in libsoup. An unsigned integer underflow in the soup_filter_input_stream_read_until() function causes a heap buffer over-read when parsing multipart HTTP responses. A malicious HTTP server can exploit this by sending a crafted multipart response, potentially causing the client application to crash or disclose sensitive heap memory.","epss":{"date":"2026-11-05","percentile":0.15968,"score":0.00246},"exploits":[],"kev":null,"metrics":[{"score":6.5,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","version":"3.1"}],"modifiedAt":1793916789637,"publishedAt":1784934080983,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-66337"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2506949"}],"remediation":[],"revision":"70702bca6f5279a2e61c9186226bc6b16df7fe9bf4060e62dda1baa1ba31cc68","sources":[{"modifiedAt":1793916789637,"name":"CNA: redhat","retrievedAt":1793920138777,"url":"https://www.cve.org/CVERecord?id=CVE-2026-66337"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793920155099,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-66337"}],"ssvc":{"assessedAt":1785168067951,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Libsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()","updatedAt":1793920155099}