Progress: >> Telerik Ui For Asp.net Ajax >> 2026.1.421 Security Vulnerabilities
In Progress® Telerik® UI for AJAX prior to v2026.2.708, RadAsyncUpload client-state processing can distinguish decrypt failures from invalid-JSON parse failures, creating an oracle that reveals protected metadata values to remote attackers.
CVSS Score
7.5
EPSS Score
0.003
Published
2026-07-22
In Progress® Telerik® UI for AJAX prior to v2026.2.708, RadAsyncUpload upload metadata processing may leak cryptographic validity through measurable timing differences, enabling remote attackers to recover protected metadata values.
CVSS Score
7.5
EPSS Score
0.003
Published
2026-07-22
In Progress® Telerik® UI for AJAX prior to v2026.2.708, when Telerik.Upload.ConfigurationHashKey is absent and machineKey is not explicitly configured, upload metadata integrity protection may fall back to a predictable default key, enabling attackers to forge protected upload metadata and unlock further exploit chains.
CVSS Score
7.5
EPSS Score
0.002
Published
2026-07-22
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