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vuln-cve/data/2026/6xxx/CVE-2026-6330.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-6330",
"assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
"state": "PUBLISHED",
"assignerShortName": "wolfSSL",
"dateReserved": "2026-04-15T03:08:30.514Z",
"datePublished": "2026-06-25T21:01:19.563Z",
"dateUpdated": "2026-06-26T10:20:49.418Z"
},
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"shortName": "wolfSSL",
"dateUpdated": "2026-06-25T21:01:19.563Z"
},
"title": "ML-KEM ARM64 NEON ciphertext comparison only compares half of the input",
"problemTypes": [
{
"descriptions": [
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"lang": "en",
"cweId": "CWE-327",
"description": "CWE-327 Use of a Broken or Risky Cryptographic Algorithm",
"type": "CWE"
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"affected": [
{
"vendor": "wolfSSL",
"product": "wolfSSL",
"collectionURL": "https://github.com/wolfSSL/wolfssl",
"versions": [
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"status": "affected",
"version": "5.7.4",
"lessThanOrEqual": "5.9.1",
"versionType": "semver"
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"value": "The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating party could fail to detect a manipulated ciphertext and proceed without the standard's required implicit rejection.",
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"value": "<p>The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating party could fail to detect a manipulated ciphertext and proceed without the standard's required implicit rejection.</p>"
}
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}
],
"references": [
{
"url": "https://github.com/wolfSSL/wolfssl/pull/10192",
"tags": [
"patch"
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},
{
"url": "https://www.wolfssl.com/docs/security-vulnerabilities/"
}
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"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "NONE",
"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": 6.3,
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
}
}
],
"credits": [
{
"lang": "en",
"value": "Nicholas Carlini from Anthropic",
"type": "finder"
}
],
"source": {
"discovery": "UNKNOWN"
},
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"metrics": [
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"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-26T10:20:21.938284Z",
"id": "CVE-2026-6330",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
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"role": "CISA Coordinator",
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"title": "CISA ADP Vulnrichment",
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