CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations
CVSS Score
5.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1321 |
| Vendor | evomap |
| Product | evolver |
| Published | May 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
EvoMap / evolver
< 1.69.3