CVE-2026-40510: OpenSC OpenSC

OpenSC < 0.27.0-rc1 Stack Buffer Overflow via piv_process_history() in card-piv.c

CVSS 1.0 LowEPSS 0.0029 · 22nd percentile

Published by the CVE Program (CNA: VulnCheck) at 29 May 2026, 13:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
OpenSC	OpenSC pkg:github/OpenSC/OpenSC	affected before 0.27.0-rc1 semver affected before 3f24f0b48a481a8cf2e46059d8238a283ddc1c13 git Other versions: affected

Identifiers

CVE-2026-40510

CNA

VulnCheck

Weakness (CWE)

CWE-121

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
1.0	Low	4.0	CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
3.8	Low	3.1	CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0029, the 22nd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 29 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/OpenSC/OpenSC/pull/3558 issue-tracking
github.com/OpenSC/OpenSC/commit/3f24f0b48a481a8cf2e46059d8238a283ddc1c13 patch
www.vulncheck.com/advisories/opensc-stack-buffer-overflow-via-piv-process-history-in-card-piv-c third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.