{"id":"CVE-2026-124688","kind":"vulnerability","aliases":["CVE-2026-124688"],"related":[],"title":"Kendo UI for jQuery: widget data can inject script into pages","description":"In Progress® Kendo® UI for jQuery prior to 2026.4.1111 the TabStrip, PanelBar, and Menu widgets support mapping a dataSource field to `spriteCssClass`. If an attacker can control the mapped data, they can break out of the attribute and inject markup, including event-handler attributes. The resulting JavaScript executes in the application's origin when a victim loads a page that renders the affected widget, allowing access to data and actions available in the victim's authenticated session.","summary":"Kendo UI for jQuery's TabStrip, PanelBar and Menu widgets insert a data field into an HTML attribute without escaping it. An attacker who controls that data can break out of the attribute and add event-handler markup that runs JavaScript in the victim's logged-in session.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["front-end","javascript","jquery","kendo-ui","package"],"not_affected_if":["no-kendo-widgets","trusted-data-only"],"how_to_check":"- Check the installed `@progress/kendo-ui` or Kendo jQuery package version in `package.json` and lockfiles.\n- Search front-end code for TabStrip, PanelBar or Menu widgets that map a dataSource field to `spriteCssClass`.","fix":"- Move to Kendo UI for jQuery `2026.4.1111` or later.","status":"open","published_at":"2026-11-11T17:17:17+00:00","first_seen_at":"2026-11-11T17:28:21+00:00","triaged_at":"2026-11-11T17:28:50+00:00","updated_at":"2026-11-11T17:28:50+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-11T17:28:50Z","model":"claude-haiku-5-5","output":{"fix":"- Move to Kendo UI for jQuery `2026.4.1111` or later.","reach":"internet","title":"Kendo UI for jQuery: widget data can inject script into pages","impact":"high","summary":"Kendo UI for jQuery's TabStrip, PanelBar and Menu widgets insert a data field into an HTML attribute without escaping it. An attacker who controls that data can break out of the attribute and add event-handler markup that runs JavaScript in the victim's logged-in session.","audience":"developers","category":"package","nicknames":[],"who_cares":["kendo-ui","jquery","javascript","front-end"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"script runs in victim's session, reading data and acting as them","analyst_note":"Confirm the affected npm package name and whether default configurations of these widgets are vulnerable; check the Progress advisory for the exact package and any workaround.","how_to_check":"- Check the installed `@progress/kendo-ui` or Kendo jQuery package version in `package.json` and lockfiles.\n- Search front-end code for TabStrip, PanelBar or Menu widgets that map a dataSource field to `spriteCssClass`.","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-kendo-widgets","trusted-data-only"],"who_is_affected":"Applications that use the Kendo UI for jQuery TabStrip, PanelBar or Menu widgets with a dataSource field mapped to spriteCssClass, where the mapped data can be influenced by an attacker. Pages that render these widgets with only trusted, server-controlled data are less exposed. The sources do not say whether the flaw is reachable in default configurations.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000789,"input_tokens":4632,"output_tokens":652,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-124688':14A,17A '-2026':13A,16A '2026.4.1111':85C 'access':143C 'action':147C 'add':61B 'affect':140C 'allow':142C 'applic':128C 'attack':49B,101C 'attribut':44B,59B,113C,121C 'authent':153C 'avail':148C 'break':55B,109C 'control':51B,103C 'cve':12A,15A 'data':6A,39B,53B,106C,145C 'datasourc':95C 'end':20B 'escap':46B 'event':63B,119C 'event-handl':62B,118C 'execut':125C 'field':40B,96C 'front':19B 'front-end':18B 'handler':64B,120C 'html':43B 'includ':117C 'inject':8A,115C 'insert':37B 'javascript':21B,68B,124C 'jqueri':4A,22B,30B,82C 'kendo':1A,24B,27B,79C 'kendo-ui':23B 'load':134C 'log':74B 'logged-in':73B 'map':93C,105C 'markup':65B,116C 'menu':35B,90C 'origin':130C 'packag':26B 'page':11A,136C 'panelbar':33B,88C 'prior':83C 'progress':78C 'render':138C 'result':123C 'run':67B 'script':9A 'session':76B,154C 'spritecssclass':98C 'support':92C 'tabstrip':32B,87C 'ui':2A,25B,28B,80C 'victim':71B,133C,151C 'widget':5A,36B,91C,141C 'without':45B","nicknames":[],"mitigations":[],"who_affected":"Applications that use the Kendo UI for jQuery TabStrip, PanelBar or Menu widgets with a dataSource field mapped to spriteCssClass, where the mapped data can be influenced by an attacker. Pages that render these widgets with only trusted, server-controlled data are less exposed. The sources do not say whether the flaw is reachable in default configurations.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["frontend","high","javascript","jquery","kendoui","package"],"campaign_type":null,"search_a":"'-124688':14A,17A '-2026':13A,16A 'cve':12A,15A 'data':6A 'inject':8A 'jqueri':4A 'kendo':1A 'page':11A 'script':9A 'ui':2A 'widget':5A","search_b":"'add':61B 'attack':49B 'attribut':44B,59B 'break':55B 'control':51B 'data':39B,53B 'end':20B 'escap':46B 'event':63B 'event-handl':62B 'field':40B 'front':19B 'front-end':18B 'handler':64B 'html':43B 'insert':37B 'javascript':21B,68B 'jqueri':22B,30B 'kendo':24B,27B 'kendo-ui':23B 'log':74B 'logged-in':73B 'markup':65B 'menu':35B 'packag':26B 'panelbar':33B 'run':67B 'session':76B 'tabstrip':32B 'ui':25B,28B 'victim':71B 'widget':36B 'without':45B","search_c":"'2026.4.1111':85C 'access':143C 'action':147C 'affect':140C 'allow':142C 'applic':128C 'attack':101C 'attribut':113C,121C 'authent':153C 'avail':148C 'break':109C 'control':103C 'data':106C,145C 'datasourc':95C 'event':119C 'event-handl':118C 'execut':125C 'field':96C 'handler':120C 'includ':117C 'inject':115C 'javascript':124C 'jqueri':82C 'kendo':79C 'load':134C 'map':93C,105C 'markup':116C 'menu':90C 'origin':130C 'page':136C 'panelbar':88C 'prior':83C 'progress':78C 'render':138C 'result':123C 'session':154C 'spritecssclass':98C 'support':92C 'tabstrip':87C 'ui':80C 'victim':133C,151C 'widget':91C,141C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T17:17:17+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","cvss_by":"security@progress.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124688","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124688","severity":null,"published_at":"2026-11-11T17:17:17+00:00","modified_at":"2026-11-11T17:17:17+00:00","first_seen_at":"2026-11-11T17:28:21+00:00","fetched_at":"2026-11-11T17:28:21+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"}