{"cve_id":"CVE-2023-4863","published":"2023-09-12T15:15:24.327000+00:00","last_modified":"2026-06-17T06:38:46.547000+00:00","vuln_status":"Analyzed","description":"Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","base_score":8.8,"base_severity":"HIGH","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-787"],"in_kev":true,"kev_date_added":"2023-09-13","kev_ransomware":false,"epss_score":0.99979,"epss_percentile":0.9998,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":true,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T10:37:45.675349+00:00","first_seen":"2023-09-12T15:15:24.327000+00:00","kev_first_seen":"2023-09-13T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["bandisoft","bentley","debian","fedoraproject","google","microsoft","mozilla","netapp","webmproject"],"products":["active_iq_unified_manager","chrome","debian_linux","edge_chromium","fedora","firefox","honeyview","libwebp","seequent_leapfrog","teams","thunderbird","webp_image_extension"],"affected":[{"vendor":"bandisoft","product":"honeyview","ranges":["< 5.51"]},{"vendor":"bentley","product":"seequent_leapfrog","ranges":["< 2023.2"]},{"vendor":"debian","product":"debian_linux","ranges":["10.0","11.0","12.0"]},{"vendor":"fedoraproject","product":"fedora","ranges":["38","39","37"]},{"vendor":"google","product":"chrome","ranges":["< 116.0.5845.187"]},{"vendor":"microsoft","product":"edge_chromium","ranges":["< 116.0.1938.81"]},{"vendor":"microsoft","product":"teams","ranges":["< 1.6.00.26463","< 1.6.00.26474"]},{"vendor":"microsoft","product":"webp_image_extension","ranges":["< 1.0.62681.0"]},{"vendor":"mozilla","product":"firefox","ranges":["< 102.15.1","< 117.0.1","≥ 115.1.0 and < 115.2.1"]},{"vendor":"mozilla","product":"thunderbird","ranges":["≥ 115.0 and < 115.2.2","< 102.15.1"]},{"vendor":"netapp","product":"active_iq_unified_manager","ranges":["all versions"]},{"vendor":"webmproject","product":"libwebp","ranges":["< 1.3.2"]}]}