CVE-2026-42077

MEDIUM

Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations

Title source: cna
STIX 2.1

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.

References (2)

Core 2
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/EvoMap/evolver/releases/tag/v1.69.3

Scores

CVSS v3 5.2
EPSS 0.0002
EPSS Percentile 5.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1321
Status published
Products (2)
evomap/evolver 0 - 1.69.3npm
EvoMap/evolver < 1.69.3
Published May 04, 2026
Tracked Since May 04, 2026