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GHSA-8QM3-746X-R74R

Vulnerability from github – Published: 2026-02-19 20:29 – Updated: 2026-02-19 20:29
VLAI
Summary
devalue `uneval`ed code can create objects with polluted prototypes when `eval`ed
Details

Under certain circumstances, unevaling untrusted data can produce output code that will create objects with polluted prototypes when later evaled, meaning the output data can be a different shape from the input data.

Severity
2.1 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.6.2"
      },
      "package": {
        "ecosystem": "npm",
        "name": "devalue"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-19T20:29:17Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "Under certain circumstances, `uneval`ing untrusted data can produce output code that will create objects with polluted prototypes when later `eval`ed, meaning the output data can be a different shape from the input data.",
  "id": "GHSA-8qm3-746x-r74r",
  "modified": "2026-02-19T20:29:17Z",
  "published": "2026-02-19T20:29:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-8qm3-746x-r74r"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/devalue/commit/0f04d4d678eac39ad5d7a07d1956275d7874e81c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sveltejs/devalue"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/devalue/releases/tag/v5.6.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "devalue `uneval`ed code can create objects with polluted prototypes when `eval`ed"
}



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