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    "cveMetadata": {
        "cveId": "CVE-2026-5295",
        "assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
        "state": "PUBLISHED",
        "assignerShortName": "wolfSSL",
        "dateReserved": "2026-03-31T23:22:25.201Z",
        "datePublished": "2026-04-09T22:53:10.635Z",
        "dateUpdated": "2026-04-14T14:32:57.454Z"
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                "shortName": "wolfSSL",
                "dateUpdated": "2026-04-09T22:53:10.635Z"
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            "title": "Stack Buffer Overflow in wolfSSL PKCS7 wc_PKCS7_DecryptOri() via Oversized OID",
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                            "lang": "en",
                            "cweId": "CWE-121",
                            "description": "CWE-121 Stack-based Buffer Overflow",
                            "type": "CWE"
                        }
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            ],
            "affected": [
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                    "vendor": "wolfSSL",
                    "product": "wolfSSL",
                    "repo": "https://github.com/wolfSSL/wolfssl",
                    "programFiles": [
                        "wolfcrypt/src/pkcs7.c"
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                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "5.9.1",
                            "versionType": "semver"
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                    ],
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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().",
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                            "value": "<p>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().</p>"
                        }
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                }
            ],
            "references": [
                {
                    "url": "https://github.com/wolfSSL/wolfssl/pull/10116"
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            ],
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                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 5.9,
                        "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"
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            "credits": [
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                    "lang": "en",
                    "value": "Sunwoo Lee, (Korea Institute of Energy Technology, KENTECH)",
                    "type": "finder"
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                {
                    "lang": "en",
                    "value": "Woohyun Choi, (Korea Institute of Energy Technology, KENTECH)",
                    "type": "finder"
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                    "lang": "en",
                    "value": "Seunghyun Yoon, (Korea Institute of Energy Technology, KENTECH)",
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            "source": {
                "discovery": "EXTERNAL"
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                            "content": {
                                "timestamp": "2026-04-14T14:32:50.288335Z",
                                "id": "CVE-2026-5295",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Technical Impact": "partial"
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                                "role": "CISA Coordinator",
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                "title": "CISA ADP Vulnrichment",
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