GHSA-jrvg-vw6c-rp59MediumCVSS 5.3
mcp-remote 0.8.0 through 0.14.3 contains a cleartext transmission vulnerability in...
🔗 CVE IDs covered (1)
📋 Description
mcp-remote 0.8.0 through 0.14.3 contains a cleartext transmission vulnerability in authorizeWithDeviceCode that sends client secrets and receives tokens without enforcing HTTPS endpoints. When discovered device authorization and token endpoints are non-loopback http URLs, on-path network attackers can capture the client secret plus issued access and refresh tokens.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-108716
- https://github.com/punkpeye/mcp-remote
- https://github.com/punkpeye/mcp-remote/blob/v0.14.3/src/lib/client-credentials.ts#L37-L47
- https://github.com/punkpeye/mcp-remote/blob/v0.14.3/src/lib/device-authorization.ts#L64-L170
- https://hackmd.io/@haind03/punkpeye-mcp-remote-device-code-cleartext-oauth-transport
- https://www.vulncheck.com/advisories/mcp-remote-0.8.0-through-0.14.3-cleartext-credential-transmission-via-device-code-oauth-grant
- https://github.com/advisories/GHSA-jrvg-vw6c-rp59