CVE-2026-42077 — MEDIUM (5.2)

Vulnerability 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.

CVSS Score

5.2

MEDIUM

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

Related Weaknesses (CWE)

CWE-1321

References

FAQ

What is CVE-2026-42077?

CVE-2026-42077 is a vulnerability with a CVSS score of 5.2 (MEDIUM). 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 Jav...

How severe is CVE-2026-42077?

CVE-2026-42077 has been rated MEDIUM with a CVSS base score of 5.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42077?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.