Auth bypass in Mem0ai Mem0
CVE-2026-49948
Mem0 versions through 0.2.8, fixed in commit ae7f406, contain a missing authorization vulnerability in the self-hosted server component where the POST /configure endpoint modifies global LLM provider and embedder configuration but only verifies authentication via JWT or X-API-Key without validating the caller's role. Any authenticated user holding a distributed API key can redirect all LLM and embedder traffic to an attacker-controlled server, with the malicious configuration persisted to PostgreSQL and surviving server restarts to affect all users and API keys on the instance.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Mem0ai Mem0 — versions 0, ae7f4062652df1376990221101d1adbb0819c973
Weakness classification (CWE)
References
- github.com/mem0ai/mem0/commit/ae7f4062652df1376990221101d1adbb0819c973 (patch)
- github.com/mem0ai/mem0/issues/5127 (issue-tracking, technical-description, exploit)
- github.com/mem0ai/mem0/issues/5384 (issue-tracking, technical-description)
- github.com/mem0ai/mem0/pull/5360 (issue-tracking)
- www.vulncheck.com/advisories/mem0-missing-authorization-via-post-configure-endp… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-49948?
- CVE-2026-49948 is a high-severity vulnerability in Mem0ai Mem0, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-06-09.
- How severe is CVE-2026-49948?
- High severity. CVSS v3 base score is 8.1 out of 10.