GHSA-5PR6-CRVP-2J9F

Vulnerability from github – Published: 2026-01-18 09:30 – Updated: 2026-02-06 22:32
VLAI
Summary
Open Chinese Convert has Out-of-bounds Write
Details

A weakness has been identified in BYVoid OpenCC up to 1.1.9. This vulnerability affects the function opencc::MaxMatchSegmentation of the file src/MaxMatchSegmentation.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. Patch name: 345c9a50ab07018f1b4439776bad78a0d40778ec. To fix this issue, it is recommended to deploy a patch.

Severity
5.3 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
1.9 (Low)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.1.9"
      },
      "package": {
        "ecosystem": "npm",
        "name": "opencc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-15536"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119",
      "CWE-787"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-06T22:32:12Z",
    "nvd_published_at": "2026-01-18T09:15:46Z",
    "severity": "LOW"
  },
  "details": "A weakness has been identified in BYVoid OpenCC up to 1.1.9. This vulnerability affects the function opencc::MaxMatchSegmentation of the file src/MaxMatchSegmentation.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. Patch name: 345c9a50ab07018f1b4439776bad78a0d40778ec. To fix this issue, it is recommended to deploy a patch.",
  "id": "GHSA-5pr6-crvp-2j9f",
  "modified": "2026-02-06T22:32:12Z",
  "published": "2026-01-18T09:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15536"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BYVoid/OpenCC/issues/997"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BYVoid/OpenCC/pull/1005"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BYVoid/OpenCC/commit/345c9a50ab07018f1b4439776bad78a0d40778ec"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/BYVoid/OpenCC"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oneafter/1222/blob/main/repro"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.341708"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.341708"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.733347"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Open Chinese Convert has Out-of-bounds Write"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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