CVE-2026-31241
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe mem0 1.0.0 server exposes a DELETE /memories endpoint that lacks authentication and authorization controls. An unauthenticated attacker can delete memory records for any user by specifying arbitrary user_id, run_id, or agent_id parameters in the request query string, causing unauthorized data loss.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 1.0.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify mem0 server versionCheck the installed version of mem0 by running: pip show mem0 or checking your package manager. Confirm version is 1.0.0.Affected if Version is 1.0.0 exactly
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Verify DELETE /memories endpoint is exposedSend an unauthenticated HTTP DELETE request to your mem0 server at /memories with any query parameter (e.g., ?user_id=test). Check if the server accepts and processes the request without returning an authentication error.Affected if The endpoint responds without requiring authentication credentials
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Confirm authentication middleware is disabled or missingInspect your mem0 server configuration files or startup logs to verify whether authentication middleware is enabled. Check for any auth-related configuration flags or middleware chain setup.Affected if Authentication middleware is not configured or is explicitly disabled for the /memories DELETE endpoint
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Test cross-user memory deletionSend a DELETE request to /memories?user_id=arbitrary_user (with a different user_id than the one making the request) without providing valid auth tokens. Observe if the deletion executes successfully.Affected if Requests with arbitrary user_id, run_id, or agent_id parameters succeed without proper ownership verification
If mem0 version 1.0.0 is running and the DELETE /memories endpoint accepts unauthenticated requests that can target any user's memories, the environment is affected by this CVE.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement authentication middleware and role-based authorization checks on the DELETE /memories endpoint to verify the requester owns or has permission to delete the targeted memory records before processing the deletion.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-31241 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-31241 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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