CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations
MEDIUM 5.2EPSS 0.3%
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.
- Affected
- EvoMap · evolver
- CVSS v3.1 GITHUB
- 5.2 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H - EPSS
- 0.28% chance of exploitation in the next 30 days, 19th percentile
- Published
- 2026-05-04
- Updated
- 2026-05-06