CVE-2026-42077: Evomap Evolver

Medium severity, CVSS 5.2. EPSS: 0.3% chance of exploitation in the next 30 days.

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 products

• Evomap Evolver: before 1.69.3 (fixed in 1.69.3)

Published 2026-05-04. Last modified 2026-06-17.