{"id":"CVE-2026-2878","aliases":["EUVD-2026-8655","GHSA-wqx8-r5jg-36w6"],"status":"published","title":"Insufficient Entropy Vulnerability in Telerik UI for ASP.NET AJAX","description":"In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00211,"percentile":0.11359,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-331"],"published":"2026-02-25T14:45:11Z","modified":"2026-06-17T10:31:56Z","products":[{"vendor":"progress","product":"telerik_ui_for_asp.net_ajax"},{"vendor":"progress software","product":"telerik ui for asp.net ajax"}],"references":[{"url":"https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-insufficient-entropy-cve-2026-2878","tags":["vendor-advisory","Mitigation","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2878"},{"url":"https://github.com/advisories/GHSA-wqx8-r5jg-36w6"}],"sources":{"cve":[{"id":"CVE-2026-2878","title":"Insufficient Entropy Vulnerability in Telerik UI for ASP.NET AJAX","description":"In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.","status":"published","published":"2026-02-25T14:45:11.142Z","modified":"2026-02-27T17:06:16.616Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T13:48:35.749498Z"}],"euvd":[{"id":"EUVD-2026-8655","description":"In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.","status":"published","published":"2026-02-25T14:45:11Z","modified":"2026-02-27T17:06:16Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T19:48:13.609806Z"}],"ghsa":[{"id":"GHSA-wqx8-r5jg-36w6","title":"In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy...","description":"In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.","status":"published","published":"2026-02-25T15:31:41Z","modified":"2026-02-25T15:31:43Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T15:06:22.176933Z"}],"nvd":[{"id":"CVE-2026-2878","description":"In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.","status":"published","published":"2026-02-25T15:20:54.293Z","modified":"2026-06-17T10:31:56.31Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T14:12:07.027269Z"}]}}