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CVE-2026-86252 h3 before 1.15.9 SSE Event Injection via Carriage Return

🗓️ 06 Sep 2026 12:00:27Reported by VulnCheckType 
cvelist
 cvelist
🔗 www.cve.org👁 45 Views

h3 before 1.15.9 allows SSE event injection via unsanitized carriage returns in EventStream.

Related
Affected
Refs
[
  {
    "vendor": "h3js",
    "product": "h3",
    "defaultStatus": "unaffected",
    "packageURL": "pkg:npm/h3",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "lessThan": "1.15.9",
        "versionType": "semver"
      },
      {
        "version": "1.15.9",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "2.0.0-beta.0",
        "status": "affected",
        "lessThan": "2.0.1-rc.17",
        "versionType": "semver"
      },
      {
        "version": "2.0.1-rc.17",
        "status": "unaffected",
        "versionType": "semver"
      }
    ]
  }
]

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06 Sep 2026 12:00Current
CVSS 3.15.3
CVSS 46.9
EPSS0.0036
SSVC
45