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Critical

Name Constraints bypass via trailing dot in rfc822Name and URI

Type: advisorySource: Official CVE List1 source record

In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

Announced Source revision 1
Original source ↗

CVE-2026-8763

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-8763

BC-JAVA

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

BC-LTS-JAVA

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

BC-FJA

Source reference: /containers/cna/affected/2/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://github.com/bcgit/bc-java",
    "vendor": "Legion of the Bouncy Castle Inc.",
    "modules": [
      "core"
    ],
    "product": "BC-JAVA",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.85",
        "versionType": "maven"
      }
    ],
    "platforms": [
      "all"
    ],
    "packageURL": "pkg:maven/org.bouncycastle/bcprov-jdk18on",
    "packageName": "bcprov",
    "programFiles": [
      "PKIXNameConstraintValidator"
    ],
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java/",
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://github.com/bcgit/bc-lts-java",
    "vendor": "Legion of the Bouncy Castle Inc.",
    "modules": [
      "core"
    ],
    "product": "BC-LTS-JAVA",
    "versions": [
      {
        "status": "affected",
        "version": "2.73.0",
        "lessThan": "2.73.12",
        "versionType": "maven"
      }
    ],
    "platforms": [
      "all"
    ],
    "packageURL": "pkg:maven/org.bouncycastle/bcprov-lts8on",
    "packageName": "bcprov-lts8on",
    "programFiles": [
      "PKIXNameConstraintValidator"
    ],
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-lts/",
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Legion of the Bouncy Castle Inc.",
    "product": "BC-FJA",
    "versions": [
      {
        "status": "affected",
        "version": "1.0.0",
        "lessThan": "1.0.2.7",
        "versionType": "maven"
      },
      {
        "status": "affected",
        "version": "2.0.0",
        "lessThan": "2.0.2",
        "versionType": "maven"
      },
      {
        "status": "affected",
        "version": "2.1.0",
        "lessThan": "2.1.3",
        "versionType": "maven"
      }
    ],
    "platforms": [
      "all"
    ],
    "packageURL": "pkg:maven/org.bouncycastle/bc-fips",
    "packageName": "bc-fips",
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-fips/",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-8763

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#8521 · Revision 1
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Publisher date
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