CVE-2026-79537
Quick assessment
Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
metatool-ai MetaMCP through 2.4.22 contains an insecure direct object reference (IDOR) in the MCP transport session dispatch. The session store (getSession in session-lifetime-manager.ts) is keyed only by the client-supplied mcp-session-id header with no owner
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I. Basic Information for CVE-2026-79537
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
metatool-ai MetaMCP through 2.4.22 contains an insecure direct object reference (IDOR) in the MCP transport session dispatch. The session store (getSession in session-lifetime-manager.ts) is keyed only by the client-supplied mcp-session-id header with no owner, namespace, or endpoint binding, and the per-endpoint authorization middleware validates only the URL endpoint's owner, never the session. An attacker who supplies another tenant's session id " obtained without authentication from GET /metamcp/health/sessions, which discloses active session IDs and namespace UUIDs " can list and execute the victim tenant's private MCP tools and exfiltrate their data using the victim's forwarded credentials.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | n/a | n/a | - |
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II. Public POCs for CVE-2026-79537
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-79537 (2)
Same Patch Batch · n/a · 2026-09-29 · 15 CVEs total
| CVE-2026-102249 | 7.3 HIGH | REBUILD file-editor-save authorization |
| CVE-2026-102248 | 7.3 HIGH | Rebuild Login Endpoint login improper authentication |
| CVE-2026-102247 | 6.8 MEDIUM | FastAdmin Database Management database.php unnecessary privileges |
| CVE-2026-77177 | CVE-2026-77177 | |
| CVE-2026-94954 | CVE-2026-94954 | |
| CVE-2026-94953 | CVE-2026-94953 | |
| CVE-2026-79535 | CVE-2026-79535 | |
| CVE-2026-79536 | CVE-2026-79536 | |
| CVE-2024-31026 | CVE-2024-31026 | |
| CVE-2026-79538 | CVE-2026-79538 | |
| CVE-2026-79534 | CVE-2026-79534 | |
| CVE-2024-31027 | CVE-2024-31027 | |
| CVE-2026-79417 | CVE-2026-79417 | |
| CVE-2026-79403 | CVE-2026-79403 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-79537
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