{"id":"CVE-2026-109497","kind":"vulnerability","aliases":["CVE-2026-109497"],"related":[],"title":"Microsoft SharePoint: cross-site scripting lets an authorized user spoof pages","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.","summary":"Microsoft Office SharePoint fails to neutralize input when it generates web pages, which is a cross-site scripting flaw. A signed-in attacker over the network can spoof content shown to other users.","severity":"high","cvss":7.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","on-premises","sharepoint","vendor"],"not_affected_if":["sharepoint-online"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:18+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","triaged_at":"2026-11-10T19:47:46+00:00","updated_at":"2026-11-10T19:47:46+00:00","category":"vendor","confidence":0.5,"triage":{"at":"2026-11-10T19:47:46Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft SharePoint: cross-site scripting lets an authorized user spoof pages","impact":"medium","summary":"Microsoft Office SharePoint fails to neutralize input when it generates web pages, which is a cross-site scripting flaw. A signed-in attacker over the network can spoof content shown to other users.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["sharepoint","microsoft-office","on-premises"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"attacker spoofs page content shown to other users","analyst_note":"Find the affected SharePoint versions and the Microsoft advisory for CVE-2026-109497 to confirm the fixed build and whether user interaction is needed.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["sharepoint-online"],"who_is_affected":"Organisations running Microsoft SharePoint on-premises or as a server product where users are authenticated. The sources do not name affected versions or configurations. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000674,"input_tokens":4510,"output_tokens":446,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the affected SharePoint versions and the Microsoft advisory for CVE-2026-109497 to confirm the fixed build and whether user interaction is needed.","search":"'-109497':15A,18A '-2026':14A,17A 'allow':78C 'attack':51B,81C 'author':9A,80C 'content':57B 'cross':4A,43B,71C 'cross-sit':3A,42B,70C 'cve':13A,16A 'fail':30B 'flaw':46B 'generat':36B,69C 'improp':62C 'input':33B,65C 'let':7A 'microsoft':1A,20B,27B,75C 'microsoft-offic':19B 'network':54B,87C 'neutral':32B,63C 'offic':21B,28B,76C 'on-premis':22B 'page':12A,38B,68C 'perform':83C 'premis':24B 'script':6A,45B,73C 'sharepoint':2A,25B,29B,77C 'shown':58B 'sign':49B 'signed-in':48B 'site':5A,44B,72C 'spoof':11A,56B,84C 'user':10A,61B 'vendor':26B 'web':37B,67C","nicknames":[],"mitigations":[],"who_affected":"Organisations running Microsoft SharePoint on-premises or as a server product where users are authenticated. The sources do not name affected versions or configurations. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","onpremises","sharepoint","vendor"],"campaign_type":null,"search_a":"'-109497':15A,18A '-2026':14A,17A 'author':9A 'cross':4A 'cross-sit':3A 'cve':13A,16A 'let':7A 'microsoft':1A 'page':12A 'script':6A 'sharepoint':2A 'site':5A 'spoof':11A 'user':10A","search_b":"'attack':51B 'content':57B 'cross':43B 'cross-sit':42B 'fail':30B 'flaw':46B 'generat':36B 'input':33B 'microsoft':20B,27B 'microsoft-offic':19B 'network':54B 'neutral':32B 'offic':21B,28B 'on-premis':22B 'page':38B 'premis':24B 'script':45B 'sharepoint':25B,29B 'shown':58B 'sign':49B 'signed-in':48B 'site':44B 'spoof':56B 'user':61B 'vendor':26B 'web':37B","search_c":"'allow':78C 'attack':81C 'author':80C 'cross':71C 'cross-sit':70C 'generat':69C 'improp':62C 'input':65C 'microsoft':75C 'network':87C 'neutral':63C 'offic':76C 'page':68C 'perform':83C 'script':73C 'sharepoint':77C 'site':72C 'spoof':84C 'web':67C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:18+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109497","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109497","severity":null,"published_at":"2026-11-10T19:18:18+00:00","modified_at":"2026-11-10T19:18:18+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","fetched_at":"2026-11-10T19:24:25+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"}