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CVE-2026-17507

🗓️ 02 Oct 2026 07:26:34Reported by bcorgType 
cve
 cve
🔗 web.nvd.nist.gov👁 2 Views

Signed int comparison in Bouncy Castle for Java MLS causes DoS via heap exhaustion.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cvelist
Cvelist
CVE-2026-17507 MLS membership checks compare a uint32 leaf_index as signed, admitting an out-of-range sender
2 Oct 202607:26
–cvelist
euvd
EUVD
EUVD-2026-91235
2 Oct 202607:26
–euvd
nvd
NVD
CVE-2026-17507
2 Oct 202608:17
–nvd
ptsecurity
Positive Technologies
PT-2026-104127
2 Oct 202600:00
–ptsecurity
redhatcve
RedhatCVE
CVE-2026-17507
2 Oct 202614:38
–redhatcve
[
  {
    "vendor": "Legion of the Bouncy Castle Inc.",
    "product": "BC-JAVA",
    "platforms": [
      "all"
    ],
    "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java/",
    "packageName": "bcmls",
    "repo": "https://github.com/bcgit/bc-java",
    "packageURL": "pkg:maven/org.bouncycastle/bcmls-jdk18on",
    "modules": [
      "mls"
    ],
    "programFiles": [
      "GroupKeySet",
      "Group"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "1.73",
        "lessThan": "1.86",
        "versionType": "maven"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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02 Oct 2026 08:17Current
5.9Medium risk
Vulners AI Score5.9
CVSS 48.7
EPSS0.00324
2