Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting payload package, versions >=3.0.0 <3.90.0>=4.0.0-canary.0 <4.0.0-canary.34
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-PAYLOAD-20570529
- published8 Oct 2026
- disclosed7 Oct 2026
- creditZerotistic
Introduced: 7 Oct 2026
NewCVE-2026-105863 (opens in a new tab)How to fix?
Upgrade payload to version 3.90.0, 4.0.0-canary.34 or higher.
Overview
payload is a Node, React and MongoDB Headless CMS and Application Framework
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes via getFieldsToSign in the JWT authentication layer, where user-controlled fields included in the JWT payload can override reserved claims (id, collection, email, sid, exp, iat). An attacker who can register or update a user account with field values that shadow these reserved JWT claims can forge authentication context, potentially gaining access as an arbitrary user or collection.