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CVE-2026-59639

🗓️ 03 Aug 2026 00:56:24Reported by bcorgType 
cve
 cve
🔗 web.nvd.nist.gov👁 138 Views

CVE-2026-59639: CMS verifySignatures accepts SignedData with zero signers across multiple BC Java variants.

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": "bcpkix",
    "repo": "https://github.com/bcgit/bc-java",
    "packageURL": "pkg:maven/org.bouncycastle/bcpkix-jdk18on",
    "modules": [
      "pkix"
    ],
    "programFiles": [
      "CMSSignedData"
    ],
    "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": "bcpkix-lts8on",
    "repo": "https://github.com/bcgit/bc-lts-java",
    "packageURL": "pkg:maven/org.bouncycastle/bcpkix-lts8on",
    "modules": [
      "pkix"
    ],
    "programFiles": [
      "CMSSignedData"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "2.73.0",
        "lessThan": "2.73.12",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Legion of the Bouncy Castle Inc.",
    "product": "BC-FJA",
    "platforms": [
      "all"
    ],
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-fips/",
    "packageName": "bcpkix-fips",
    "packageURL": "pkg:maven/org.bouncycastle/bcpkix-fips",
    "versions": [
      {
        "status": "affected",
        "version": "1.0.0",
        "lessThan": "1.0.12",
        "versionType": "maven"
      },
      {
        "status": "affected",
        "version": "2.0.0",
        "lessThan": "2.0.12",
        "versionType": "maven"
      },
      {
        "status": "affected",
        "version": "2.1.0",
        "lessThan": "2.1.12",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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04 Aug 2026 14:50Current
5.4Medium risk
Vulners AI Score5.4
CVSS 48.7
EPSS0.00174
SSVC
138