What’s Vulnerable › Vulnerabilities

CVE-2026-42077: Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations

• Severity: medium (CVSS 5.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-04 · updated 2026-10-26
• Weakness: CWE-1321

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.

Affected products

• EvoMap evolver: before 1.69.3

References

• https://github.com/EvoMap/evolver/releases/tag/v1.69.3
• https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4
• https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4

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