CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations
- State
- Published
- Severity
- 5.2 Medium
- Published
- May 4, 2026
- Updated
- May 6, 2026
- Reserved
- Apr 23, 2026
Description
Evolver is a GEP-powered self-evolving engine for AI agents. Prior to version 1.69.3, a prototype pollution vulnerability in the mailbox store module allows attackers to modify the behavior of all JavaScript objects by injecting malicious properties into Object.prototype. The vulnerability exists in the _applyUpdate() and _updateRecord() functions which use Object.assign() to merge user-controlled data without filtering dangerous keys like __proto__, constructor, or prototype. This issue has been patched in version 1.69.3.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.2 Medium | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H | GitHub_M |
Weaknesses
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Products
| Product | Versions |
|---|---|
evolverEvoMap |
|
References
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