Response playbooks, investigation guides, and Atomic Red Team tests are Pro-only. Upgrade to unlock the full detection package for CVE-2026-50027.
Upgrade to ProDetect MCP Memory Service Unauthenticated Document API Access (CVE-2026-50027) in CrowdStrike LogScale
Detects exploitation of CVE-2026-50027, a missing authentication vulnerability (CWE-306) in mcp-memory-service versions prior to 10.67.1 that allows unauthenticated attackers to read, write, and delete stored memory documents via exposed API endpoints. Successful exploitation grants full unauthenticated access to sensitive memory/document contents, enabling data exfiltration, tampering, or destruction of stored AI agent memory state.
MITRE ATT&CK
- Tactic
- Initial Access Collection Impact
LogScale Detection Query
#event_simpleName=HttpRequest
| RequestURI=/*documents*/ OR RequestURI=/*memory*/
| HttpMethod=GET OR HttpMethod=POST OR HttpMethod=PUT OR HttpMethod=DELETE
| RequestHeaders!="*Authorization*"
| stats count() as requestCount by ClientIP, RequestURI, HttpMethod, bucket(5m, timestamp)
| test(requestCount > 5)CrowdStrike Query Language detection for repeated unauthenticated HTTP requests to mcp-memory-service document/memory endpoints observed via network/host telemetry, indicating exploitation of CVE-2026-50027.
Data Sources
Required Tables
False Positives & Tuning
- Endpoint sensor visibility gaps causing incomplete header capture that misrepresents authenticated traffic as unauthenticated
- Legitimate lightweight clients or CLI tools that authenticate via query-string tokens rather than headers
- Repeated benign polling from an internal dashboard configured to hit the endpoint without credentials in a trusted network segment
Other platforms for CVE-2026-50027
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Unauthenticated GET to document API
Expected signal: HTTP GET request to /api/documents recorded in web/proxy access logs with no Authorization header present.
- Test 2Unauthenticated write to memory endpoint
Expected signal: HTTP POST request to /api/memory recorded in application logs with the injected content and no Authorization header.
- Test 3Unauthenticated delete of stored document
Expected signal: HTTP DELETE request to /api/documents/<id> recorded in access and application logs with no Authorization header, followed by removal of the document from the data store.
Unlock playbooks & atomic tests with Pro
Get the full detection package for CVE-2026-50027 — response playbook and atomic red team tests, plus investigation guidance and hunting queries.
df00tech Pro — £29/user/month