{"id":"GHSA-c567-44rc-m5hq","revision":null,"records":[{"revision":"5f29d3926b534b9a8d050d178cad1dc7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44483","aliases":[],"title":"RVF: Prototype pollution in @rvf/set-get reachable via @rvf/core preprocessFormData (HTTP form data)","description":"RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not block the keys __proto__, constructor, or prototype when walking a path. Because field names in submitted form data are passed directly to setPath via preprocessFormData (and through parseFormData / validate), an attacker who can submit a form to a Remix / React Router app using the library can set arbitrary properties on Object.prototype of the running server process. This is a default-reachable prototype pollution primitive: no special configuration is required. Any endpoint that accepts a form via parseFormData or runs a validator created with createValidator is affected. This vulnerability is fixed in 6.0.4 and 7.0.2.","state":0,"publishedAt":"2026-05-27T15:20:43.045+00:00","modifiedAt":"2026-05-27T18:48:41.768+00:00","affected":[{"ecosystem":"Vendor product","name":"rvf","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"airjp73\",\n                    \"product\": \"rvf\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 7.0.0, < 7.0.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 6.0.0, < 6.0.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"set-get","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@rvf\",\n                    \"product\": \"set-get\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 7.0.0, < 7.0.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 6.0.0, < 6.0.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","score":8.2,"severity":"HIGH"}],"references":["https://github.com/airjp73/rvf/security/advisories/GHSA-c567-44rc-m5hq"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44483","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44483","identifiers":["CVE-2026-44483"]},"retained":false,"historicalAffected":[]},{"revision":"35a407403dbb42ba865e22d43f3423b9","observedAt":"2026-11-07T10:30:53.631+00:00","statement":{"source":"euvd","id":"EUVD-2026-32564","aliases":["CVE-2026-44483","GHSA-c567-44rc-m5hq"],"title":"RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not …","description":"RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not block the keys __proto__, constructor, or prototype when walking a path. Because field names in submitted form data are passed directly to setPath via preprocessFormData (and through parseFormData / validate), an attacker who can submit a form to a Remix / React Router app using the library can set arbitrary properties on Object.prototype of the running server process. This is a default-reachable prototype pollution primitive: no special configuration is required. Any endpoint that accepts a form via parseFormData or runs a validator created with createValidator is affected. This vulnerability is fixed in 6.0.4 and 7.0.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","score":8.2,"severity":null}],"references":["https://github.com/airjp73/rvf/security/advisories/GHSA-c567-44rc-m5hq"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-32564","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 27, 2026, 3:20:43 PM","dateUpdated":"May 27, 2026, 6:48:41 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-32564","identifiers":["EUVD-2026-32564","CVE-2026-44483","GHSA-c567-44rc-m5hq"]},"retained":false,"historicalAffected":[]},{"revision":"96d3cd0a80ef48cd91b5d227cd916469","observedAt":"2026-10-27T11:12:17.434+00:00","statement":{"source":"nvd","id":"CVE-2026-44483","aliases":[],"title":"RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not …","description":"RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not block the keys __proto__, constructor, or prototype when walking a path. Because field names in submitted form data are passed directly to setPath via preprocessFormData (and through parseFormData / validate), an attacker who can submit a form to a Remix / React Router app using the library can set arbitrary properties on Object.prototype of the running server process. This is a default-reachable prototype pollution primitive: no special configuration is required. Any endpoint that accepts a form via parseFormData or runs a validator created with createValidator is affected. This vulnerability is fixed in 6.0.4 and 7.0.2.","state":0,"publishedAt":"2026-05-27T17:16:39.51+00:00","modifiedAt":"2026-10-26T11:10:00.157+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","score":8.2,"severity":"HIGH"}],"references":["https://github.com/airjp73/rvf/security/advisories/GHSA-c567-44rc-m5hq"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44483","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-1321"],"productCriteria":[],"sourceDates":{"published":"2026-05-27T17:16:39.510","lastModified":"2026-10-26T11:10:00.157"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-44483","identifiers":["CVE-2026-44483"]},"retained":false,"historicalAffected":[]},{"revision":"a0f83adb7e894197bac5c989533a443d","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-c567-44rc-m5hq","aliases":["CVE-2026-44483"],"title":"@rvf/set-get has a prototype pollution issue that's reachable via @rvf/core preprocessFormData (HTTP form data)","description":"## Summary\n\n`setPath` in `@rvf/set-get` (used by `@rvf/core` to flatten incoming form data into a nested object) does not block the keys `__proto__`, `constructor`, or `prototype` when walking a path. Because field names in submitted form data are passed directly to `setPath` via `preprocessFormData` (and through `parseFormData` / `validate`), an attacker who can submit a form to a Remix / React Router app using the library can set arbitrary properties on `Object.prototype` of the running server process.\n\nThis is a default-reachable prototype pollution primitive: no special configuration is required. Any endpoint that accepts a form via `parseFormData` or runs a validator created with `createValidator` is affected.\n\n## Affected versions\n\n- `@rvf/set-get` `< 7.0.2` (7.x line)\n- `@rvf/set-get` `< 6.0.4` (6.x line)\n\nReached through `@rvf/core` versions that depend on a vulnerable `@rvf/set-get` (current `8.1.0` resolves to `7.0.1` without the override).\n\n## Patched\n\n- `@rvf/set-get` `7.0.2`\n- `@rvf/set-get` `6.0.4`\n\nThe fix adds a `REJECT_KEYS` blocklist (`__proto__`, `constructor`, `prototype`) and throws when one is encountered while walking a path inside `setPath`.\n\n## Proof of concept\n\nInstall a vulnerable resolution and run on Node 18+:\n\n```json\n{\n  \"dependencies\": { \"@rvf/core\": \"8.1.0\" },\n  \"overrides\": { \"@rvf/set-get\": \"7.0.1\" }\n}\n```\n\n```js\nconst { preprocessFormData } = require('@rvf/core');\n\nconst form = new FormData();\nform.append(\"username\", \"alice\");\nform.append(\"__proto__[polluted]\", \"yes\");\n\npreprocessFormData(form);\nconsole.log(({}).polluted); // -> 'yes'\n```\n\nThe field name `__proto__[polluted]` is the kind of value an attacker can submit from any HTML form or HTTP client. After the call, every plain object in the process inherits `polluted = 'yes'`.\n\nA second working payload is `constructor.prototype.<key>=<value>`, which goes through `setPath` walking `constructor` then `prototype`.\n\n## Impact\n\n- Any property assignable on `Object.prototype` of the server process, set by a single unauthenticated HTTP request.\n- Persists for the life of the worker process and affects every subsequent request handled by the same process.\n- Direct downstream consequences depend on the host application and the rest of its dependency tree, but typical risks include: bypassing `if (obj.isAdmin)` style checks, injecting unintended config values into objects merged with user input, breaking template rendering, and crashing the worker by polluting properties used by other libraries (DoS).\n- Worth noting: the visible output of `preprocessFormData` does not contain the malicious key, so the attack leaves no obvious trace in request logs that show parsed bodies.\n\n## CVSS\n\n`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L` (8.2, High)\n\nIntegrity is High because the primitive lets the attacker change the meaning of property reads on every object in the process. Confidentiality is None and Availability is Low without a named downstream gadget; both could be higher in a specific consuming app.\n\n## Remediation for users\n\nUpgrade to `@rvf/set-get` `7.0.2` or `6.0.4`. If you cannot upgrade `@rvf/core` directly, an `npm` / `pnpm` override on `@rvf/set-get` works.\n\n## Credit\n\nReported by Mohamed Bassia (@0xBassia).","state":0,"publishedAt":"2026-05-11T16:09:40+00:00","modifiedAt":"2026-09-10T03:50:46.5007165+00:00","affected":[{"ecosystem":"npm","name":"@rvf/set-get","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.0.0"},{"kind":"fixed","version":"7.0.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@rvf/set-get","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"6.0.0"},{"kind":"fixed","version":"6.0.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/airjp73/rvf/security/advisories/GHSA-c567-44rc-m5hq","https://nvd.nist.gov/vuln/detail/CVE-2026-44483","https://github.com/airjp73/rvf"],"sourceUrl":"https://github.com/advisories/GHSA-c567-44rc-m5hq","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-c567-44rc-m5hq","identifiers":["GHSA-c567-44rc-m5hq","CVE-2026-44483"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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