CVE-2026-42077

MediumCVSS 5.2/10Last modified Jun 17, 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.

Metrics

CVSS 3.1 5.2/10CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
May 4, 2026
Last modified
Jun 17, 2026
NVD status
Deferred

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CVE-2026-42077: Medium severity, CVSS 5.2 | Vulnix