# CVE-2026-105040: EnergizeLab Eilik NestJS auth service mass assignment account takeover

Source: https://junglewise.ai/threats/cve-2026-105040-the-energizelab-eilik-nestjs-auth-service-accepts-a-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-15. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-105040 · Severity: high · CVSS 8.8 · Published 2026-10-15

EnergizeLab Eilik is a robot platform that uses a NestJS authentication service to manage user accounts. An attacker can exploit a mass assignment vulnerability in the account update feature to change another user's account identifier and take over their account by making a simple request with a modified user ID parameter.

Technologies: [EnergizeLab Eilik](https://junglewise.ai/threats/technologies/eilik). Vendors: [EnergizeLab](https://junglewise.ai/threats/vendors/energizelab).

## Quick answers

**Is CVE-2026-105040 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105040 being exploited in the wild.

**How severe is CVE-2026-105040?** High severity, with a CVSS score of 8.8, published 15 October 2026.

**Which products and versions are affected?** EnergizeLab Eilik.

**Is there a fix for CVE-2026-105040?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-105040 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-105040?** Check whether you run EnergizeLab Eilik. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The NestJS auth service fails to validate that a user can only modify their own account identifier during update requests, allowing a registered user to submit a user-controlled user ID parameter that overwrites another account's identifier. This mass assignment vulnerability allows account takeover without requiring elevated privileges or special authentication beyond a valid user account.

## Affected products

- EnergizeLab Eilik

## Timeline

- 2026-10-15: disclosed

## References

- [https://github.com/xn0tsa/your-secrets-are-safe-with-me](https://github.com/xn0tsa/your-secrets-are-safe-with-me)
- [https://takeonme.org/gcves/GCVE-1337-2026-00000000000000011111111111111111111000000000000000000011111101001111111110000000000000000000011111111111111111111000000000000010100/](https://takeonme.org/gcves/GCVE-1337-2026-00000000000000011111111111111111111000000000000000000011111101001111111110000000000000000000011111111111111111111000000000000010100/)

## Related threats

- [EnergizeLab Eilik and EilikO authentication bypass in FastAPI services](https://junglewise.ai/threats/cve-2026-105038-the-energizelab-eilik-and-eiliko-fastapi-ai-inference-and)
- [EnergizeLab Eilik NestJS auth service authentication bypass](https://junglewise.ai/threats/cve-2026-105034-the-energizelab-eilik-nestjs-auth-service-issues-device-tokens)
- [EnergizeLab Eilik and EilikO unauthenticated file upload with path traversal](https://junglewise.ai/threats/cve-2026-105032-the-energizelab-eilik-and-eiliko-ai-skill-upload-endpoint-served)