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CVE-2026-12816 IESEngine stream-mode MAC forgery via length-dependent KDF split

🗓️ 03 Aug 2026 02:53:32Reported by bcorgType 
cvelist
 cvelist
🔗 www.cve.org👁 58 Views

CVE-2026-12816: IESEngine stream-mode MAC forgery via length-dependent KDF split in Bouncy Castle Java before 1.85.

Related
Affected
Refs
[
  {
    "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": [
      "IESEngine"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.85",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Legion of the Bouncy Castle Inc.",
    "product": "BC-LTS-JAVA",
    "platforms": [
      "all"
    ],
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-lts/",
    "packageName": "bcprov-lts8on",
    "repo": "https://github.com/bcgit/bc-lts-java",
    "packageURL": "pkg:maven/org.bouncycastle/bcprov-lts8on",
    "modules": [
      "core"
    ],
    "programFiles": [
      "IESEngine"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "2.73.0",
        "lessThan": "2.73.12",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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03 Aug 2026 05:58Current
CVSS 48.7
EPSS0.00157
58