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CVE-2026-18036 NTRU leaks private key information by reducing secret values with a non-constant-time integer division

🗓️ 02 Oct 2026 07:54:16Reported by bcorgType 
cvelist
 cvelist
🔗 www.cve.org👁 3 Views

NTRU in Bouncy Castle for Java leaks private key information via non-constant-time division.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-18036
2 Oct 202607:54
–cve
euvd
EUVD
EUVD-2026-91317
2 Oct 202609:31
–euvd
nvd
NVD
CVE-2026-18036
2 Oct 202608:17
–nvd
ptsecurity
Positive Technologies
PT-2026-104155
2 Oct 202600:00
–ptsecurity
[
  {
    "vendor": "Legion of the Bouncy Castle Inc.",
    "product": "BC-JAVA",
    "platforms": [
      "all"
    ],
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java/",
    "packageName": "bcprov",
    "repo": "https://github.com/bcgit/bc-java",
    "packageURL": "pkg:maven/org.bouncycastle/bcprov-jdk18on",
    "modules": [
      "core"
    ],
    "programFiles": [
      "Polynomial",
      "NTRUSampling"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "1.73",
        "lessThan": "1.86",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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