CVE-2026-109332CWE-346

CVE-2026-109332

Low · published October 12, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
1.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
2.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00120 · 1.7th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-10-12T21:17Z
References (3)
https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-4pvg-m42h-c3x2 · [email protected]https://www.vulncheck.com/advisories/network-ai-before-5.15.2-cors-origin-validation-error-in-mcp-sse-transport · [email protected]https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-4pvg-m42h-c3x2 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:05Z
    Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport
    cvelistv5
  • 12 OCT 16:05Z
    Network-AI before 5.15.2 CORS Origin Validation Error in MCP SSE Transport
    cvelistv5