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Upgrade to ProDetect 9router (npm) Unprotected Database Import/Export Leading to Credential Theft and Database Takeover (CVE-2026-55500) in Sumo Logic CSE
CVE-2026-55500 affects the 9router npm package (<= 0.4.71), which exposes an unauthenticated/improperly-protected database import/export interface. Attackers can invoke this exposed functionality to exfiltrate the entire application database — including credentials, session tokens, and configuration secrets — or import a malicious database to achieve full application takeover. CVSS 9.9, CWE-200 (Exposure of Sensitive Information). A public PoC/advisory exists (GHSA-qvfm-67h2-2qfx). Detections focus on anomalous HTTP requests to database export/import endpoints, bulk data egress, unauthenticated administrative API access, and post-exploitation credential misuse.
MITRE ATT&CK
Sumo Detection Query
_sourceCategory=webapp/access
| parse "* * * [*] \"* * *\" * *" as clientip, ident, user, ts, method, uri, proto, status, bytes
| where uri matches "*export*" or uri matches "*import*" or uri matches "*backup*"
| where user matches "-" or user matches ""
| count by clientip, uri, status
| where _count >= 1Flags unauthenticated requests to 9router database export/import/backup endpoints across ingested web access logs, correlating to CVE-2026-55500 exploitation attempts.
Data Sources
Required Tables
False Positives & Tuning
- Log parsers that fail to capture the authenticated user field for legitimate sessions
- Internal automated backup processes not tied to a user session
- Search engine or uptime-monitoring crawlers hitting similarly named paths
Other platforms for CVE-2026-55500
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 1Simulate Unauthenticated Database Export Request
Expected signal: Web server access log entry showing GET/POST to /api/db/export with no Authorization or session cookie header, response status 200 and non-trivial body size.
- Test 2Simulate Unauthorized Database Import
Expected signal: Web server log entry for POST to /api/db/import with multipart file upload and no auth header; application log showing database write/replace event.
- Test 3Scripted Reconnaissance of Export/Import/Backup Endpoints
Expected signal: Multiple sequential unauthenticated HTTP requests from a single source IP to distinct export/import/backup paths within a short time window, with a scripted (non-browser) User-Agent.
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