# OpenSC vulnerabilities

Source: https://junglewise.ai/threats/vendors/opensc  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/opensc.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in OpenSC: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-103531, was published on 1 October 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 5 (0 critical, 0 exploited in the wild)

## About OpenSC

OpenSC is an open-source library and set of tools for working with smart cards and cryptographic tokens.

## Latest OpenSC vulnerabilities

- [CVE-2026-103531: OpenSC stack-based buffer overflow in setcos_construct_fci_44](https://junglewise.ai/threats/cve-2026-103531-a-flaw-has-been-found-in-opensc-up-to-0-27-1-the-impacted) (medium, CVSS 5.5, published 1 Oct 2026)
- [CVE-2026-10275: OpenSC pkcs11-tool buffer overflow in test_kpgen_certwrite](https://junglewise.ai/threats/cve-2026-10275-opensc-pkcs11-tool-buffer-overflow-in-test-kpgen-certwrite) (medium, CVSS 5, published 1 Jun 2026)
- [CVE-2026-40528: OpenSC buffer overrun in do_key_value function](https://junglewise.ai/threats/cve-2026-40528-opensc-buffer-overrun-in-do-key-value-function) (low, CVSS 3.8, published 29 May 2026)
- [CVE-2026-40510: OpenSC stack buffer overflow in PIV card history processing](https://junglewise.ai/threats/cve-2026-40510-opensc-stack-buffer-overflow-in-piv-card-history-processing) (low, CVSS 3.8, published 29 May 2026)
- [CVE-2025-13763: OpenSC libopensc uninitialized variables in card detection](https://junglewise.ai/threats/cve-2025-13763-opensc-libopensc-uninitialized-variables-in-card-detection) (medium, CVSS 5.7, published 23 Apr 2026)

## Most severe OpenSC vulnerabilities

- [CVE-2025-13763: OpenSC libopensc uninitialized variables in card detection](https://junglewise.ai/threats/cve-2025-13763-opensc-libopensc-uninitialized-variables-in-card-detection) (medium, CVSS 5.7, published 23 Apr 2026)
- [CVE-2026-103531: OpenSC stack-based buffer overflow in setcos_construct_fci_44](https://junglewise.ai/threats/cve-2026-103531-a-flaw-has-been-found-in-opensc-up-to-0-27-1-the-impacted) (medium, CVSS 5.5, published 1 Oct 2026)
- [CVE-2026-10275: OpenSC pkcs11-tool buffer overflow in test_kpgen_certwrite](https://junglewise.ai/threats/cve-2026-10275-opensc-pkcs11-tool-buffer-overflow-in-test-kpgen-certwrite) (medium, CVSS 5, published 1 Jun 2026)
- [CVE-2026-40528: OpenSC buffer overrun in do_key_value function](https://junglewise.ai/threats/cve-2026-40528-opensc-buffer-overrun-in-do-key-value-function) (low, CVSS 3.8, published 29 May 2026)
- [CVE-2026-40510: OpenSC stack buffer overflow in PIV card history processing](https://junglewise.ai/threats/cve-2026-40510-opensc-stack-buffer-overflow-in-piv-card-history-processing) (low, CVSS 3.8, published 29 May 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "OpenSC vulnerabilities", https://junglewise.ai/threats/vendors/opensc, 9 November 2026.