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vuln-cve/data/2026/59xxx/CVE-2026-59644.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-59644",
"assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630",
"state": "PUBLISHED",
"assignerShortName": "bcorg",
"dateReserved": "2026-07-06T06:58:29.263Z",
"datePublished": "2026-08-03T00:50:50.154Z",
"dateUpdated": "2026-08-03T13:36:10.480Z"
},
"containers": {
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"shortName": "bcorg",
"dateUpdated": "2026-08-03T05:02:50.266Z"
},
"title": "MLS hash-ratchet honours arbitrary 32-bit generation counter from sender",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-834",
"description": "CWE-834 Excessive Iteration",
"type": "CWE"
}
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],
"affected": [
{
"vendor": "Legion of the Bouncy Castle Inc.",
"product": "BC-JAVA",
"platforms": [
"all"
],
"collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java/",
"packageName": "bcmls",
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"packageURL": "pkg:maven/org.bouncycastle/bcmls-jdk18on",
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],
"programFiles": [
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],
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"version": "1.73",
"lessThan": "1.85",
"versionType": "maven"
}
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],
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{
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"value": "<p>In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.</p>"
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}
],
"references": [
{
"url": "https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059644",
"tags": [
"vendor-advisory"
]
},
{
"url": "https://github.com/bcgit/bc-java/commit/610d8757d855afe197df0de6d831cb75c81e3b9f",
"tags": [
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}
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"cvssV4_0": {
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"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"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": "AMBER",
"version": "4.0",
"baseSeverity": "HIGH",
"baseScore": 8.7,
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber"
}
}
],
"credits": [
{
"lang": "en",
"value": "Alex Gaynor in collaboration with Claude and Anthropic Research",
"type": "reporter"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "bc release-notes template"
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"content": {
"timestamp": "2026-08-03T13:36:00.578531Z",
"id": "CVE-2026-59644",
"options": [
{
"Exploitation": "none"
},
{
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},
{
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],
"role": "CISA Coordinator",
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"title": "CISA ADP Vulnrichment",
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}