CVE-2026-2878 is an insufficient entropy vulnerability affecting Progress Telerik UI for AJAX versions prior to 2026.1.225. The RadAsyncUpload component generates predictable temporary identifiers based on timestamps and filenames, which can lead to collisions and allow attackers to tamper with file content. Rated Medium (CVSS 5.9), this vulnerability has a network attack vector and high integrity impact, but requires high attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2011.2.712, < 2026.1.225CPE match | cpe:2.3:a:progress:telerik_ui_for_asp.net_ajax:*:*:*:*:*:*:*:* | ||
< 2026.1.225CPE matchmatch criteria | cpe:2.3:a:progress:telerik_ui_for_asp.net_ajax:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.