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vuln-cve/data/2026/4xxx/CVE-2026-4159.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-4159",
"assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
"state": "PUBLISHED",
"assignerShortName": "wolfSSL",
"dateReserved": "2026-03-13T20:37:44.765Z",
"datePublished": "2026-03-19T21:17:46.357Z",
"dateUpdated": "2026-03-20T16:29:05.925Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
"shortName": "wolfSSL",
"dateUpdated": "2026-03-19T21:17:46.357Z"
},
"title": "wc_PKCS7_DecodeEnvelopedData 1 byte out-of-bounds read",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds read",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "wolfSSL",
"product": "wolfSSL",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "5.9.0",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.",
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"base64": false,
"value": "<p>1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.</p>"
}
]
}
],
"references": [
{
"url": "https://github.com/wolfSSL/wolfssl/pull/9945"
}
],
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"format": "CVSS",
"scenarios": [
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"lang": "en",
"value": "GENERAL"
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],
"cvssV4_0": {
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "PROOF_OF_CONCEPT",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "GREEN",
"version": "4.0",
"baseSeverity": "LOW",
"baseScore": 1.2,
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green"
}
}
],
"credits": [
{
"lang": "en",
"value": "Haruto Kimura (Stella)",
"type": "finder"
}
],
"source": {
"discovery": "EXTERNAL"
},
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-03-20T16:28:57.791675Z",
"id": "CVE-2026-4159",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-03-20T16:29:05.925Z"
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}