Progress Telerik UI for ASP.NET AJAX up to 2026.2.707 RadAsyncUpload timing discrepancy

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k2.01+

Summaryinfo

A vulnerability classified as problematic has been found in Progress Telerik UI for ASP.NET AJAX up to 2026.2.707. Affected by this issue is some unknown functionality of the component RadAsyncUpload. This manipulation causes timing discrepancy. The identification of this vulnerability is CVE-2026-13183. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Progress Telerik UI for ASP.NET AJAX up to 2026.2.707. Affected by this vulnerability is some unknown processing of the component RadAsyncUpload. The manipulation with an unknown input leads to a timing discrepancy vulnerability. The CWE definition for the vulnerability is CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at telerik.com. This vulnerability is known as CVE-2026-13183 since 06/24/2026. The exploitation appears to be difficult. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 2026.2.708 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Timing discrepancy
CWE: CWE-208 / CWE-203 / CWE-200
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Telerik UI for ASP.NET AJAX 2026.2.708

Timelineinfo

06/24/2026 CVE reserved
07/22/2026 +28 days Advisory disclosed
07/22/2026 +0 days VulDB entry created
07/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: telerik.com
Status: Confirmed

CVE: CVE-2026-13183 (🔒)
GCVE (CVE): GCVE-0-2026-13183
GCVE (VulDB): GCVE-100-382339

Entryinfo

Created: 07/22/2026 16:15
Changes: 07/22/2026 16:15 (53)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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