Use of Uninitialized Variable Affecting opensc/opensc package, versions [,0.27.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-OPENSCOPENSC-16304813
- published27 Apr 2026
- disclosed23 Apr 2026
- creditMatteo Marini, Aldo Ristori
Introduced: 23 Apr 2026
CVE-2025-13763 (opens in a new tab)How to fix?
Upgrade opensc/opensc to version 0.27.0 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Variable in the handling of APDU responses due to the use of uninitialized variables. An attacker can cause an application crash or access sensitive information by connecting a specially crafted USB device or smart card to the system. This is only exploitable if the attacker has physical access to connect a malicious device.