GHSA-mwv9-gp5h-frr4
Suggest an improvement- Source
- https://github.com/advisories/GHSA-mwv9-gp5h-frr4
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mwv9-gp5h-frr4/GHSA-mwv9-gp5h-frr4.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-mwv9-gp5h-frr4
- Published
- 2026-03-12T16:38:15Z
- Modified
- 2026-05-14T21:49:07.005215Z
- Severity
-
- 2.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U CVSS Calculator
- Summary
- Sveltejs devalue's `devalue.parse` and `devalue.unflatten` emit objects with `__proto__` own properties
- Details
-
In some circumstances,
devalue.parseanddevalue.unflattencould emit objects with__proto__own properties. This in and of itself is not a security vulnerability (and is possible with, for example,JSON.parseas well), but it can result in prototype injection if downstream code handles it incorrectly:const result = devalue.parse(/* input creating an object with a __proto__ property */); const target = {}; Object.assign(target, result); // target's prototype is now polluted - Database specific
{ "severity": "LOW", "cwe_ids": [ "CWE-1321" ], "github_reviewed": true, "github_reviewed_at": "2026-03-12T16:38:15Z", "nvd_published_at": null }- References
Affected packages
npm / devalue
Package
- Name
- devalue
- View open source insights on deps.dev
- Purl
- pkg:npm/devalue