ghsa-j8r3-cghj-9jhg
Vulnerability from github
Published
2025-05-15 15:31
Modified
2025-06-03 15:31
Severity ?
5.9 (Medium) - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Details

There is an issue in CPython when using bytes.decode("unicode_escape", error="ignore|replace"). If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-4516"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-15T14:15:31Z",
    "severity": "MODERATE"
  },
  "details": "There is an issue in CPython when using `bytes.decode(\"unicode_escape\", error=\"ignore|replace\")`. If you are not using the \"unicode_escape\" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.",
  "id": "GHSA-j8r3-cghj-9jhg",
  "modified": "2025-06-03T15:31:24Z",
  "published": "2025-05-15T15:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/133767"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/129648"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/4398b788ffc1f954a2c552da285477d42a571292"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/6279eb8c076d89d3739a6edb393e43c7929b429d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/69b4387f78f413e8c47572a85b3478c47eba8142"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/73b3040f592436385007918887b7e2132aa8431f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/8d35fd1b34935221aff23a1ab69a429dd156be77"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/9f69a58623bd01349a18ba0c7a9cb1dad6a51e8e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/ab9893c40609935e0d40a6d2a7307ea51aec598b"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/L75IPBBTSCYEF56I2M4KIW353BB3AY74"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/05/16/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/05/19/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:P/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",
      "type": "CVSS_V4"
    }
  ]
}


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