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Upgrade to ProDetect MCP Memory Service Unauthenticated Document API Access (CVE-2026-50027) in Sumo Logic CSE
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
Sumo Detection Query
_sourceCategory=web/proxy OR _sourceCategory=app/mcp-memory-service
| parse "* * * \"* * *\"" as src_ip, ident, user, method, uri, proto
| where uri matches "*documents*" or uri matches "*memory*"
| where !(_raw matches "*Authorization:*")
| timeslice 5m
| count by src_ip, method, uri, _timeslice
| where _count > 5Detects bursts of unauthenticated GET/POST/PUT/DELETE requests to mcp-memory-service document/memory endpoints in Sumo Logic web/proxy data, indicating potential CVE-2026-50027 exploitation.
Data Sources
Required Tables
False Positives & Tuning
- Automated vulnerability scanners performing authorized asset inventory
- Reverse proxy configurations that omit the Authorization header from access logs entirely
- Internal service mesh traffic authenticated via mTLS rather than HTTP Authorization headers
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.
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