{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-2878 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-2878 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-2878 is a medium-severity vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-2878 and fix it if it is affected.\n\nWhat it is: CVE-2026-2878 is a medium-severity vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-2878 in the wild and no public exploit code.\n\nAffected product: Progress Software Telerik UI for ASP.NET AJAX. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-2878/ (Markdown: https://insights.sbomify.com/CVE-2026-2878/index.md)","id":"CVE-2026-2878","markdown":"https://insights.sbomify.com/CVE-2026-2878/index.md","name":"CVE-2026-2878","record":{"aliases":["GHSA-wqx8-r5jg-36w6"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"ASP.NET AJAX UI library","requires_auth":"none","summary":"Attackers can tamper with file content in RadAsyncUpload due to predictable temporary identifiers caused by insufficient entropy.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"ProgressSoftware","cpe":[{"product":"telerik_ui_for_asp.net_ajax","vendor":"progress"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-331","name":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Insufficient Entropy Vulnerability in Telerik UI for ASP.NET AJAX","id":"CVE-2026-2878","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"GetGenie \u003c= 4.3.2 - Insecure Direct Object Reference to Authenticated (Author+) Arbitrary Post Overwrite/Deletion","id":"CVE-2026-2879"},"packages":[],"prev":{"headline":"Tenda A18 Httpd Service WifiExtraSet strcpy stack-based overflow","id":"CVE-2026-2877"},"products":["Telerik UI for ASP.NET AJAX"],"published":"2026-02-25","related":[{"cvss_score":9.8,"headline":"Telerik UI for ASP.NET AJAX Insecure Direct Object Reference","id":"CVE-2017-11357","kev_date_added":"2023-01-26","published":"2017-08-23"},{"cvss_score":9.8,"headline":"Missing authorization in n/a","id":"CVE-2021-28141","kev_date_added":null,"published":"2021-03-11"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2019-19790","kev_date_added":null,"published":"2019-12-13"},{"cvss_score":8.1,"headline":"RadAsyncUpload AsyncUploadTypeName Type Resolution Vulnerability in Telerik UI for ASP.NET AJAX","id":"CVE-2026-13181","kev_date_added":null,"published":"2026-07-22"},{"cvss_score":8.1,"headline":"PersistenceFramework Cookie Deserialization Vulnerability in Telerik UI for ASP.NET AJAX","id":"CVE-2026-13185","kev_date_added":null,"published":"2026-07-22"},{"cvss_score":8.1,"headline":"AppDataStorageProvider Path Traversal Deserialization Vulnerability in Telerik UI for ASP.NET AJAX","id":"CVE-2026-13186","kev_date_added":null,"published":"2026-07-22"},{"cvss_score":8.1,"headline":"DialogHandler Provider Type Tampering Vulnerability in Telerik UI for ASP.NET AJAX","id":"CVE-2026-13187","kev_date_added":null,"published":"2026-07-22"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-27","vendors":["Progress Software"]},"summary":"Attackers can tamper with file content in RadAsyncUpload due to predictable temporary identifiers caused by insufficient entropy.","url":"https://insights.sbomify.com/CVE-2026-2878/"}