Low severity · published Oct 12, 2026
CVE-2026-109332
Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport
3.1
CVSS
0.1%
EPSS
No
On KEV
Description
Network-AI (npm network-ai) before 5.15.2 contains an origin validation error in McpSseServer._handleRequest in lib/mcp-transport-sse.ts that reflects localhost Origins into Access-Control-Allow-Origin regardless of bind interface. When the server binds a non-loopback address, an attacker page with a localhost Origin visited by a victim can read unauthenticated endpoints like /health cross-origin.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
Network-AI · Jovancoding
before 5.15.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109332
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109332
vendor-advisory
https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-4pvg-m42h-c3x2
third-party-advisory
https://www.vulncheck.com/advisories/network-ai-before-5.15.2-cors-origin-validation-error-in-mcp-sse-transport
More from Network-AI
9.9
CVE-2026-54051
Network-AI has an an OS Command Injection issue
9.1
CVE-2026-48814
Network-AI: Empty default secret still authorizes all requests (Incomplete fix for CVE-2026-46701)
8.8
CVE-2026-73615
Network-AI SandboxPolicy before 5.15.1 Blocklist Bypass via Quote Mismatch
8.8
CVE-2026-73614
Network-AI ClaudeHookBridge Deny Pattern Bypass via Truncation
8.7
CVE-2026-42856
Network-AI: Missing authentication on MCP HTTP endpoint allows unauthenticated privileged tool calls