VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder

{
  "id": "bd94eacfbdfad8517697c2d2b54b9b1c6a5f67d9048ffab7c43ab94e6e2f700d",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116738",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder",
    "summary": "VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.",
    "evidence": "cve:CVE-2026-116738",
    "products": [
      {
        "name": {
          "value": "vmime",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-116738",
      "aliases": [
        "CVE-2026-116738"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 8.7,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "userInteraction": "PASSIVE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH"
          }
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          "format": "CVSS",
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            "version": "3.1",
            "baseScore": 8.8,
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "integrityImpact": "HIGH",
            "userInteraction": "REQUIRED",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/kisli/vmime",
          "vendor": "kisli",
          "product": "vmime",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "0.9.2"
            }
          ],
          "packageURL": "pkg:github/kisli/vmime",
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T14:16:56.633Z",
      "provider": "cve",
      "references": [
        "https://github.com/kisli/vmime/pull/363",
        "https://github.com/kisli/vmime/commit/e85925eddc638939f0eeb7ee55ec047d04a760d8",
        "https://github.com/kisli/vmime",
        "https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L185-L190",
        "https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-write",
        "https://www.vulncheck.com/advisories/vmime-through-0.9.2-stack-based-buffer-overflow-via-uuencode-decoder"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-116738",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-27T13:52:10.451418Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "dateUpdated": "2026-10-27T14:16:56.633Z"
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          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-26T21:52:37.804Z"
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    "related_cves": [
      {
        "value": "CVE-2026-116738",
        "evidence": "/cveMetadata/cveId"
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    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 392651,
  "published_at": "2026-10-26T21:52:37.804+00:00"
}