GHSA-R6R4-8M79-7VVV高危未审查

无摘要

OSV 1.4.0 · unreviewed · 修改于 2026-08-21 02:31

发布时间

2026-08-21 02:31

GitHub 审查时间

—

NVD 发布时间

2026-08-21 02:16

源文件

advisories/unreviewed/2026/08/GHSA-r6r4-8m79-7vvv/GHSA-r6r4-8m79-7vvv.json

公告说明

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.

受影响的软件包

该公告没有提供结构化的受影响软件包信息。

参考链接

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-76641

标识信息

别名 / CVE

CVE-2026-76641

CWE

CWE-125

软件生态

无

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS_V4

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

原始 OSV JSON

{
  "id": "GHSA-r6r4-8m79-7vvv",
  "aliases": [
    "CVE-2026-76641"
  ],
  "details": "Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.",
  "affected": [],
  "modified": "2026-08-20T18:31:00Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
    },
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
    }
  ],
  "published": "2026-08-20T18:31:00Z",
  "references": [
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76641",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/libexpat/libexpat/pull/1331",
      "type": "WEB"
    },
    {
      "url": "https://github.com/libexpat/libexpat/commit/98599f6dcc2b460410881fe420f5f55d6bec63bf",
      "type": "WEB"
    },
    {
      "url": "https://www.vulncheck.com/advisories/expat-out-of-bounds-read-via-dtdcopy",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "severity": "HIGH",
    "github_reviewed": false,
    "nvd_published_at": "2026-08-20T18:16:51Z",
    "github_reviewed_at": null
  }
}