Buffer Overflow Affecting opensc/opensc package, versions [,0.27.0-rc1)
Threat Intelligence
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-17429027
- published23 Jun 2026
- disclosed29 May 2026
- creditNicholas Carlini
Introduced: 29 May 2026
CVE-2026-40510 (opens in a new tab)How to fix?
Upgrade opensc/opensc to version 0.27.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Buffer Overflow via the piv_process_history function. An attacker can cause memory corruption and potentially execute arbitrary code or disrupt system stability by presenting a specially crafted Personal Identity Verification (PIV) smart card or USB device that returns a URL field longer than expected in the Key History Object ASN.1 response. This is only exploitable if the attacker has physical access to the system.