{"id":"CVE-2026-100204","kind":"vulnerability","aliases":["CVE-2026-100204"],"related":[],"title":"HEIF Image Extensions: use-after-free lets a local attacker run code","description":"Use after free in HEIF Image Extensions allows an unauthorized attacker to execute code locally.","summary":"HEIF Image Extensions has a use-after-free memory bug. A local attacker with no authorization can use it to execute code on the machine.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"HEIF Image Extensions","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["heif-image-extensions","other","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:39+00:00","first_seen_at":"2026-11-10T19:24:12+00:00","triaged_at":"2026-11-10T19:54:21+00:00","updated_at":"2026-11-10T19:54:21+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:54:21Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"HEIF Image Extensions: use-after-free lets a local attacker run code","impact":"high","summary":"HEIF Image Extensions has a use-after-free memory bug. A local attacker with no authorization can use it to execute code on the machine.","audience":"everyone","category":"other","nicknames":[],"who_cares":["windows","heif-image-extensions"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"code runs locally with the attacker's privileges","analyst_note":"Check the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2026-100204) for affected versions, the vendor fixed build, and whether any user interaction is needed.","how_to_check":"unknown","plain_action":"","product_name":"HEIF Image Extensions","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000638,"input_tokens":4480,"output_tokens":380,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2026-100204) for affected versions, the vendor fixed build, and whether any user interaction is needed.","search":"'-100204':16A,19A '-2026':15A,18A 'allow':62C 'attack':11A,42B,65C 'author':45B 'bug':39B 'code':13A,51B,68C 'cve':14A,17A 'execut':50B,67C 'extens':3A,26B,31B,61C 'extensions':22A 'free':7A,37B,57C 'heif':1A,20A,24B,29B,59C 'heif-image-extens':23B 'imag':2A,25B,30B,60C 'image':21A 'let':8A 'local':10A,41B,69C 'machin':54B 'memori':38B 'run':12A 'unauthor':64C 'use':5A,35B,47B,55C 'use-after-fre':4A,34B 'window':28B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":["heifimageextensions","imageextensions"],"ptokens":["extensions","heif","image"],"labels":["heifimageextensions","high","other","vendor","windows"],"campaign_type":null,"search_a":"'-100204':16A,19A '-2026':15A,18A 'attack':11A 'code':13A 'cve':14A,17A 'extens':3A 'extensions':22A 'free':7A 'heif':1A,20A 'imag':2A 'image':21A 'let':8A 'local':10A 'run':12A 'use':5A 'use-after-fre':4A","search_b":"'attack':42B 'author':45B 'bug':39B 'code':51B 'execut':50B 'extens':26B,31B 'free':37B 'heif':24B,29B 'heif-image-extens':23B 'imag':25B,30B 'local':41B 'machin':54B 'memori':38B 'use':35B,47B 'use-after-fre':34B 'window':28B","search_c":"'allow':62C 'attack':65C 'code':68C 'execut':67C 'extens':61C 'free':57C 'heif':59C 'imag':60C 'local':69C 'unauthor':64C 'use':55C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:39+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-100204","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100204","severity":null,"published_at":"2026-11-10T19:17:39+00:00","modified_at":"2026-11-10T19:17:39+00:00","first_seen_at":"2026-11-10T19:24:12+00:00","fetched_at":"2026-11-10T19:24:12+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}