RadAsyncUpload Upload Metadata Timing Oracle Vulnerability in Telerik UI for ASP.NET AJAX
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-208.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Telerik UI for ASP.NET AJAX (Progress Software) Fixed in 2026.2.708
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Progress Software Telerik UI for ASP.NET AJAX 2026.2.708
13 records Highest priority Priority LOW 13 LOW
Other records, highest priority first
- TI-2026-11200 SpellChecker DictionaryLanguage Path Traversal Vulnerability in Telerik UI for ASP.NET AJAXPriority LOW 39
- TI-2026-11197 AppDataStorageProvider Path Traversal Deserialization Vulnerability in Telerik UI for ASP.NET AJAXPriority LOW 39
- TI-2026-11195 RadAsyncUpload Default HMAC Key Fallback Vulnerability in Telerik UI for ASP.NET AJAXPriority LOW 39
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13183
- 2026-10-03 Alias added: GHSA-c5xq-jjwj-x369
References
More Progress Telerik Ui For Asp.net Ajax vulnerabilities
- TI-2017-08395 Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-03167 Unsafe Reflection Vulnerability in Telerik UI for ASP.NET AJAX CVSS 3.1HIGH 7.5
- TI-2019-14262 Path traversal in RadChart in Telerik UI for ASP.NET AJAX allows a remote attacker to… CVSS 3.1CRITICAL 9.8
- TI-2021-09372 An issue was discovered in Progress Telerik UI for ASP.NET AJAX 2021.1.224. CVSS 3.1CRITICAL 9.8
- TI-2026-05284 Deserialization of Untrusted Data Vulnerability in Telerik UI for ASP.NET AJAX CVSS 3.1CRITICAL 9.8
- TI-2014-01755 Absolute path traversal vulnerability in the RadAsyncUpload control in the RadControls in… CVSS 2.0HIGH 7.5
Sources
- CVE-2026-13183 · CVE Program
- CVE-2026-13183 · NVD
- FIRST EPSS
- GHSA-c5xq-jjwj-x369 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences