{
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        {
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          "packageURL": "pkg:github/ggml-org/llama.cpp",
          "product": "llama.cpp",
          "vendor": "ggml-org",
          "versions": [
            {
              "lessThan": "b10261",
              "status": "affected",
              "version": "b5899",
              "versionType": "custom"
            }
          ]
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      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "b10261",
                  "versionStartIncluding": "b5899",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Pedro Cruz (g4nkd)"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Jeongwoo Lee"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "CISC"
        }
      ],
      "datePublic": "2026-07-21T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "llama.cpp b5899 before b10261 contains a heap out-of-bounds write vulnerability in llm_tokenizer_plamo2::build that allows attackers to corrupt heap memory via crafted GGUF models. Attackers can supply BYTE-typed token text like \u003c0x-1\u003e whose negative parsed value writes token ids before the bytes_ buffer during model loading, causing crashes or potential code execution."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
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            "vulnIntegrityImpact": "HIGH"
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-129",
              "description": "Improper Validation of Array Index",
              "lang": "en",
              "type": "CWE"
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          ]
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      "providerMetadata": {
        "dateUpdated": "2026-10-27T00:33:58.581Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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      "references": [
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/ggml-org/llama.cpp/pull/25969"
        },
        {
          "tags": [
            "patch",
            "issue-tracking"
          ],
          "url": "https://github.com/ggml-org/llama.cpp/pull/26511"
        },
        {
          "tags": [
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          "url": "https://github.com/ggml-org/llama.cpp/commit/cf06ad7dfe79e7bf2934150d4fefe1ce8db05490"
        },
        {
          "tags": [
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          "url": "https://github.com/ggml-org/llama.cpp/blob/b10259/src/llama-vocab.cpp#L1376-L1377"
        },
        {
          "name": "llama.cpp b10261 Release Notes",
          "tags": [
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          "url": "https://github.com/ggml-org/llama.cpp/releases/tag/b10261"
        },
        {
          "name": "VulnCheck Advisory: llama.cpp b5899 before b10261 Heap Out-of-Bounds Write via plamo2 Tokenizer",
          "tags": [
            "third-party-advisory"
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          "url": "https://www.vulncheck.com/advisories/llama-cpp-b5899-before-b10261-heap-out-of-bounds-write-via-plamo2-tokenizer"
        }
      ],
      "title": "llama.cpp b5899 before b10261 Heap Out-of-Bounds Write via plamo2 Tokenizer",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-116816",
    "datePublished": "2026-10-27T00:33:58.581Z",
    "dateReserved": "2026-10-26T22:13:56.315Z",
    "dateUpdated": "2026-10-27T00:33:58.581Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}