Name Constraints bypass via trailing dot in rfc822Name and URI
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).
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
- Added to Heist Feed
- Publisher date