# CVE-2026-31243: mem0 server missing authentication in DELETE memories endpoint

Source: https://junglewise.ai/threats/cve-2026-31243-mem0-server-missing-authentication-in-delete-memories-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-14  
License: CC BY 4.0 with a link back

CVE-2026-31243 · Severity: medium · CVSS 6.5 · Published 2026-05-12

A vulnerability exists in the mem0 server, a tool used to provide memory layers for AI agents. An unauthenticated user can remotely trigger a command that resets the system's memory and recreates database tables. This can lead to total data loss, disruption of AI services, and a complete denial of service for the memory management platform.

## Quick answers

**Is CVE-2026-31243 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-31243 being exploited in the wild.

**How severe is CVE-2026-31243?** Medium severity, with a CVSS score of 6.5, published 12 May 2026.

**Which products and versions are affected?** mem0ai mem0 1.0.0.

**Is there a fix for CVE-2026-31243?** 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-2026-31243 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-31243?** Check whether anything you run is named in the advisory. 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 mem0 1.0.0 server is vulnerable to missing authentication (CWE-306) and missing authorization (CWE-862) on its 'DELETE /memories' endpoint. An unauthenticated remote attacker can send a DELETE request to this endpoint, which triggers a memory reset operation. This operation executes a 'CREATE TABLE' SQL statement, causing existing tables to be dropped or recreated. This results in schema disruption, permanent data loss, and a denial of service (DoS) for the memory management service. The attack requires no special privileges or user interaction.

## Affected products

- mem0ai mem0 1.0.0

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory
- 2026-05-13: other: CISA-ADP enrichment added CVSS and CWE data

## References

- [https://github.com/mem0ai/mem0](https://github.com/mem0ai/mem0)
- [https://www.notion.so/CVE-2026-31243-35d1e139318881c6a6cffbe366c238a6](https://www.notion.so/CVE-2026-31243-35d1e139318881c6a6cffbe366c238a6)