TI-2026-30445 Aliases CVE-2026-42077 GHSA-2cjr-5v3h-v2w4

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

MEDIUM 57CWE-1321Published 2026-05-04 · Updated 2026-05-06

Key facts

Attack vector: Local
Privileges required: High
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: Low · Low · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00157 4th percentileScored 2026-11-07

Fix Fixed evolver (EvoMap): 1.69.3@evomap/evolver (npm): 1.69.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
EvoMap	evolver	before 1.69.3	1.69.3	Patch available	CNA
—	@evomap/evolver (npm)	before 1.69.3	1.69.3	Patch available	GHSA-2cjr-5v3h-v2w4

evolver VendorEvoMap Affected before 1.69.3 Fixed in 1.69.3 Patch available CNA
@evomap/evolver (npm) Vendor— Affected before 1.69.3 Fixed in 1.69.3 Patch available GHSA-2cjr-5v3h-v2w4

Remediation

Fix · CNA evolver (EvoMap) Fixed in 1.69.3
Fix · GHSA-2cjr-5v3h-v2w4 @evomap/evolver (npm) Fixed in 1.69.3 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-42077
2026-10-03 Alias added: GHSA-2cjr-5v3h-v2w4

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-42077

Other 3

TI-2026-30444 Evolver: Command Injection via `execSync` in `_extractLLM()` function allows Remote Code Execution CVSS 3.1CRITICAL 9.8
TI-2026-30443 Evolver: Path Traversal via `--out` flag in `fetch` command allows Arbitrary File Write CVSS 3.1HIGH 8.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences