Auth bypass in Mem0
CVE-2026-31241
The mem0 1.0.0 server lacks authentication and authorization controls for its memory deletion API endpoint (DELETE /memories). The endpoint allows unauthenticated users to delete memory records by specifying arbitrary user identifiers (e.g., user_id, run_id, agent_id) in the request query parameters. A remote attacker can exploit this by sending unauthenticated DELETE requests to erase memory data for any user, leading to unauthorized data loss and denial of service.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.006 (43.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Mem0 — versions 1.0.0
Weakness classification (CWE)
References
- github.com/mem0ai/mem0 (Product)
- www.notion.so/CVE-2026-31241-35d1e139318881459ae5e6f0d7dc6f0f (Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2026-31241?
- CVE-2026-31241 is a medium-severity vulnerability in Mem0, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-05-12.
- How severe is CVE-2026-31241?
- Medium severity. CVSS v3 base score is 6.5 out of 10.