Medium severity · published May 29, 2026
CVE-2026-40510
OpenSC < 0.27.0-rc1 Stack Buffer Overflow via piv_process_history() in card-piv.c
6.8
CVSS
0.3%
EPSS
No
On KEV
Description
OpenSC before 0.27.0-rc1, fixed in commit 3f24f0b, contains a stack buffer overflow vulnerability in piv_process_history() in src/libopensc/card-piv.c that allows physically present attackers to trigger memory corruption by presenting a crafted PIV smart card or USB device returning a URL field longer than 118 bytes in the Key History Object ASN.1 response.
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Physical
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenSC · OpenSC
before 0.27.0-rc1; before 3f24f0b48a481a8cf2e46059d8238a283ddc1c13 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40510
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40510
Patch
https://github.com/OpenSC/OpenSC/commit/3f24f0b48a481a8cf2e46059d8238a283ddc1c13
Issue Tracking
https://github.com/OpenSC/OpenSC/pull/3558
Third Party Advisory
https://www.vulncheck.com/advisories/opensc-stack-buffer-overflow-via-piv-process-history-in-card-piv-c
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