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CVE-2026-8763

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).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ec5068247c6038f0a5f8d7bcf06f2aba80c41257a90dd44c554b0e633a2f0f93
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java/","defaultStatus":"unaffected","modules":["core"],"packageName":"bcprov","packageURL":"pkg:maven/org.bouncycastle/bcprov-jdk18on","platforms":["all"],"product":"BC-JAVA","programFiles":["PKIXNameConstraintValidator"],"repo":"https://github.com/bcgit/bc-java","vendor":"Legion of the Bouncy Castle Inc.","versions":[{"lessThan":"1.85","status":"affected","version":"0","versionType":"maven"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/affected/0

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/affected/1

{"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-fips/","defaultStatus":"unaffected","packageName":"bc-fips","packageURL":"pkg:maven/org.bouncycastle/bc-fips","platforms":["all"],"product":"BC-FJA","vendor":"Legion of the Bouncy Castle Inc.","versions":[{"lessThan":"1.0.2.7","status":"affected","version":"1.0.0","versionType":"maven"},{"lessThan":"2.0.2","status":"affected","version":"2.0.0","versionType":"maven"},{"lessThan":"2.1.3","status":"affected","version":"2.1.0","versionType":"maven"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/affected/2

Affected products and versions

3 source assertions
{"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java/","defaultStatus":"unaffected","modules":["core"],"packageName":"bcprov","packageURL":"pkg:maven/org.bouncycastle/bcprov-jdk18on","platforms":["all"],"product":"BC-JAVA","programFiles":["PKIXNameConstraintValidator"],"repo":"https://github.com/bcgit/bc-java","vendor":"Legion of the Bouncy Castle Inc.","versions":[{"lessThan":"1.85","status":"affected","version":"0","versionType":"maven"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/affected/0
{"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-lts/","defaultStatus":"unaffected","modules":["core"],"packageName":"bcprov-lts8on","packageURL":"pkg:maven/org.bouncycastle/bcprov-lts8on","platforms":["all"],"product":"BC-LTS-JAVA","programFiles":["PKIXNameConstraintValidator"],"repo":"https://github.com/bcgit/bc-lts-java","vendor":"Legion of the Bouncy Castle Inc.","versions":[{"lessThan":"2.73.12","status":"affected","version":"2.73.0","versionType":"maven"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/affected/1
{"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-fips/","defaultStatus":"unaffected","packageName":"bc-fips","packageURL":"pkg:maven/org.bouncycastle/bc-fips","platforms":["all"],"product":"BC-FJA","vendor":"Legion of the Bouncy Castle Inc.","versions":[{"lessThan":"1.0.2.7","status":"affected","version":"1.0.0","versionType":"maven"},{"lessThan":"2.0.2","status":"affected","version":"2.0.0","versionType":"maven"},{"lessThan":"2.1.3","status":"affected","version":"2.1.0","versionType":"maven"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImp…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["patch"],"url":"https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908763"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fb5f1d4243db0a4af5f57c8141639225d7cd083aeb4b3963ca813a835baa304f · sha256:603302765ca879b5… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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