CVE Explorer
CVE-2026-46510
form-data-objectizer converts FormData to object. Prior to 1.0.1, form-data-objectizer walks bracket-notation form keys (e.g. name[sub]) into nested objects without filtering __proto__, constructor, or prototype. A single HTTP form field whose name starts with __proto__[...] causes the library to mutate Object.prototype, which is a prototype pollution primitive of the entire Node.js process. This vulnerability is fixed in 1.0.1.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"form-data-objectizer","vendor":"kaspernj","versions":[{"status":"affected","version":"< 1.0.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:5e242540341494f368fab193dbde9455124eb17c6400ea8ea49299fcd4af9500 · sha256:dd3d33b9e2cefbbb… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:5e242540341494f368fab193dbde9455124eb17c6400ea8ea49299fcd4af9500 · sha256:dd3d33b9e2cefbbb… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:5e242540341494f368fab193dbde9455124eb17c6400ea8ea49299fcd4af9500 · sha256:dd3d33b9e2cefbbb… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/kaspernj/form-data-objectizer/commit/7c54b99408e6e9cd6533b7245bf197dadc2a2dbc","tags":["x_refsource_MISC"],"url":"https://github.com/kaspernj/form-data-objectizer/commit/7c54b99408e6e9cd6533b7245bf197dadc2a2dbc"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5e242540341494f368fab193dbde9455124eb17c6400ea8ea49299fcd4af9500 · sha256:dd3d33b9e2cefbbb… · /containers/cna/references/1
{"name":"https://github.com/kaspernj/form-data-objectizer/security/advisories/GHSA-m2hg-wjq3-28wq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kaspernj/form-data-objectizer/security/advisories/GHSA-m2hg-wjq3-28wq"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5e242540341494f368fab193dbde9455124eb17c6400ea8ea49299fcd4af9500 · sha256:dd3d33b9e2cefbbb… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/kaspernj/form-data-objectizer/security/advisories/GHSA-m2hg-wjq3-28wq"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5e242540341494f368fab193dbde9455124eb17c6400ea8ea49299fcd4af9500 · sha256:dd3d33b9e2cefbbb… · /containers/adp/0/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.