VULNERABILITY INTELLIGENCE
CVE-2026-42077
CVSS score5.2 MEDIUM
EPSS probability0.16%
CISA KEVNot currently listed
Published2026-05-04
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H
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.
Weakness classification
- security-advisories@github.com: CWE-1321