{"id":"GHSA-qcm7-3vpr-hj5h","revision":"db4106eb19e7409780a6c79cc26a6336","records":[{"revision":"db4106eb19e7409780a6c79cc26a6336","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-qcm7-3vpr-hj5h","aliases":["CVE-2026-48795"],"title":"@adonisjs/bodyparser has an incomplete fix for CVE-2026-25754","description":"### Summary\n\nThe fix for [GHSA-f5x2-vj4h-vg4c](https://github.com/adonisjs/core/security/advisories/GHSA-f5x2-vj4h-vg4c) / CVE-2026-25754 introduced in commit [`40e1c71`](https://github.com/adonisjs/bodyparser/commit/40e1c71f958cffb74f6b91bed6630dca979062ed) is incomplete and can be bypassed through nested prototype pollution payloads.\n\nThe original patch replaced the internal `FormFields` storage object with `Object.create(null)`, preventing direct payloads such as `__proto__.polluted`. However, payloads containing a non-dangerous segment before `__proto__` or `constructor.prototype`, such as `user.__proto__.polluted`, still lead to `Object.prototype` pollution.\n\nThis issue is exploitable remotely through a single unauthenticated `multipart/form-data` request using the default configuration.\n\n### Affected versions\n\n- `>= 10.1.3 < 10.1.5`\n- `>= 11.0.0-next.9 < 11.0.3`\n\n### Details\n\nThe regression tests added by the original fix only covered direct payloads such as:\n\n- `__proto__.polluted`\n- `constructor.prototype.polluted`\n\nThese payloads are blocked because the root object no longer inherits from `Object.prototype`.\n\nHowever, lodash `_.set()` (via `@poppinss/utils`) still creates intermediate objects using plain `{}` values. Once a normal segment is encountered, subsequent `__proto__` or `constructor.prototype` segments regain access to `Object.prototype`.\n\n### Impact\n\nAn unauthenticated attacker can remotely pollute `Object.prototype` on any route accepting multipart/form-data requests behind `BodyParserMiddleware`.\n\nBecause the pollution is process-wide, the impact may include authorization bypasses, unexpected behavior in downstream libraries, or prototype pollution gadget chains leading to remote code execution.\n\n### Patches\n\nFixes targeting v6 and v7 have been published below.\n\nUsers should upgrade to a version that includes the following fix:\n\n- https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5\n- https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3\n\n### References\n\n- [CWE-1321](https://cwe.mitre.org/data/definitions/1321.html)\n- Prior advisory this bypasses: [GHSA-f5x2-vj4h-vg4c](https://github.com/adonisjs/core/security/advisories/GHSA-f5x2-vj4h-vg4c) / CVE-2026-25754","state":0,"publishedAt":"2026-06-30T18:34:32+00:00","modifiedAt":"2026-09-10T03:50:50.1871221+00:00","affected":[{"ecosystem":"npm","name":"@adonisjs/bodyparser","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.1.3"},{"kind":"fixed","version":"10.1.5"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@adonisjs/bodyparser","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"11.0.0-next.9"},{"kind":"fixed","version":"11.0.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/adonisjs/core/security/advisories/GHSA-f5x2-vj4h-vg4c","https://github.com/adonisjs/core/security/advisories/GHSA-qcm7-3vpr-hj5h","https://github.com/adonisjs/bodyparser/commit/40e1c71f958cffb74f6b91bed6630dca979062ed","https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5","https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3","https://github.com/adonisjs/core"],"sourceUrl":"https://github.com/advisories/GHSA-qcm7-3vpr-hj5h","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-qcm7-3vpr-hj5h","identifiers":["GHSA-qcm7-3vpr-hj5h","CVE-2026-48795"]},"retained":false,"historicalAffected":[]}],"coverage":[]}