CVE-2026-58496 (GCVE-0-2026-58496)

Vulnerability from cvelistv5 – Published: 2026-10-27 22:18 – Updated: 2026-10-27 22:18
VLAI
Title
ThorVG: Out-of-bounds Read in SFNT/TTF Font Loader via Memory API
Summary
Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader's `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that the input buffer contains at least four bytes. Loading an undersized font directly from memory through public APIs such as `tvg::Text::load` causes an out-of-bounds read. Loading through a file path using `mmap` can mask the read because of page alignment; the memory-loading API directly exposes it. Depending on memory layout, a malformed short font may crash the consuming application or disclose adjacent heap memory. This issue is fixed in version 1.0.7.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7838 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
thorvg thorvg Affected: < 1.0.7
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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          "product": "thorvg",
          "vendor": "thorvg",
          "versions": [
            {
              "status": "affected",
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          "value": "Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader\u0027s `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that the input buffer contains at least four bytes. Loading an undersized font directly from memory through public APIs such as `tvg::Text::load` causes an out-of-bounds read. Loading through a file path using `mmap` can mask the read because of page alignment; the memory-loading API directly exposes it. Depending on memory layout, a malformed short font may crash the consuming application or disclose adjacent heap memory. This issue is fixed in version 1.0.7."
        }
      ],
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            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T22:18:34.301Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/thorvg/thorvg/security/advisories/GHSA-crfw-c34f-vqrj",
          "tags": [
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          ],
          "url": "https://github.com/thorvg/thorvg/security/advisories/GHSA-crfw-c34f-vqrj"
        },
        {
          "name": "https://github.com/thorvg/thorvg/commit/1dc232a33535946b5eed5fd65e993b13226da0ca",
          "tags": [
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          "url": "https://github.com/thorvg/thorvg/commit/1dc232a33535946b5eed5fd65e993b13226da0ca"
        },
        {
          "name": "https://github.com/thorvg/thorvg/releases/tag/v1.0.7",
          "tags": [
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          ],
          "url": "https://github.com/thorvg/thorvg/releases/tag/v1.0.7"
        }
      ],
      "source": {
        "advisory": "GHSA-crfw-c34f-vqrj",
        "discovery": "UNKNOWN"
      },
      "title": "ThorVG: Out-of-bounds Read in SFNT/TTF Font Loader via Memory API"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-58496",
    "datePublished": "2026-10-27T22:18:34.301Z",
    "dateReserved": "2026-06-30T20:21:25.813Z",
    "dateUpdated": "2026-10-27T22:18:34.301Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
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          }
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader\u0027s `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that the input buffer contains at least four bytes. Loading an undersized font directly from memory through public APIs such as `tvg::Text::load` causes an out-of-bounds read. Loading through a file path using `mmap` can mask the read because of page alignment; the memory-loading API directly exposes it. Depending on memory layout, a malformed short font may crash the consuming application or disclose adjacent heap memory. This issue is fixed in version 1.0.7."
          }
        ],
        "id": "CVE-2026-58496",
        "lastModified": "2026-10-27T23:17:06.420",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
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                "confidentialityImpact": "LOW",
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                "userInteraction": "REQUIRED",
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            "url": "https://github.com/thorvg/thorvg/commit/1dc232a33535946b5eed5fd65e993b13226da0ca"
          },
          {
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            "url": "https://github.com/thorvg/thorvg/releases/tag/v1.0.7"
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            "url": "https://github.com/thorvg/thorvg/security/advisories/GHSA-crfw-c34f-vqrj"
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        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
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                "value": "CWE-125"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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