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CVE-2026-71891 BLS12-381 key validation accepts a public key built on a foreign curve

🗓️ 03 Oct 2026 08:56:01Reported by bcorgType 
cvelist
 cvelist
🔗 www.cve.org👁 44 Views

Bouncy Castle for Java BLS12_381BasicScheme.keyValidate accepts public keys on foreign curves.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
atlassian
Atlassian
Cryptographic Failure org.bouncycastle:bcprov-jdk18on Dependency in Bamboo Data Center
16 Oct 202601:45
–atlassian
atlassian
Atlassian
Cryptographic Failure org.bouncycastle:bcprov-jdk18on Dependency in Crucible Server
16 Oct 202601:45
–atlassian
cve
CVE
CVE-2026-71891
3 Oct 202608:56
–cve
debiancve
Debian CVE
CVE-2026-71891
3 Oct 202608:56
–debiancve
euvd
EUVD
EUVD-2026-92005
3 Oct 202608:56
–euvd
mend
Mend
CVE-2026-71891
3 Oct 202608:56
–mend
nvd
NVD
CVE-2026-71891
3 Oct 202609:17
–nvd
opensuse
OPENSUSE Linux
bouncycastle-1.86-1.1 on GA media (moderate)
21 Oct 202600:00
–opensuse
osv_cleanstart
osv_cleanstart
CLEANSTART-2026-DK36206 In Bouncy Castle for Java before 1
22 Oct 202600:39
–osv_cleanstart
osv_cleanstart
osv_cleanstart
CLEANSTART-2026-HW07490 In Bouncy Castle for Java before 1
8 Oct 202600:42
–osv_cleanstart
Rows per page
[
  {
    "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": [
      "BLS12_381BasicScheme",
      "BLS12_381G1"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "1.85",
        "lessThan": "1.86",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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