CVE-2026-5295

A stack buffer overflow exists in wolfSSL's PKCS7 implementation in the wc_PKCS7_DecryptOri() function in wolfcrypt/src/pkcs7.c. When processing a CMS EnvelopedData message containing an OtherRecipientInfo (ORI) recipient, the function copies an ASN.1-parsed OID into a fixed 32-byte stack buffer (oriOID[MAX_OID_SZ]) via XMEMCPY without first validating that the parsed OID length does not exceed MAX_OID_SZ. A crafted CMS EnvelopedData message with an ORI recipient containing an OID longer than 32 bytes triggers a stack buffer overflow. Exploitation requires the library to be built with --enable-pkcs7 (disabled by default) and the application to have registered an ORI decrypt callback via wc_PKCS7_SetOriDecryptCb().

CVSS v3 8.0 HIGH

8.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.1 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/wolfSSL/wolfssl/pull/10116	Issue Tracking Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

History

29 Apr 2026, 14:08

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.0
References	~~() https://github.com/wolfSSL/wolfssl/pull/10116 -~~	() https://github.com/wolfSSL/wolfssl/pull/10116 - Issue Tracking, Patch
CPE		cpe:2.3:a:wolfssl:wolfssl::::::::
First Time		Wolfssl Wolfssl wolfssl

09 Apr 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-09 23:17

Updated : 2026-04-29 14:08

NVD link : CVE-2026-5295

Mitre link : CVE-2026-5295

CVE.ORG link : CVE-2026-5295

JSON object : View

Products Affected

wolfssl

wolfssl

CWE

CWE-121

Stack-based Buffer Overflow

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