{"id":"CVE-2026-108716","title":"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","summary":"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 en…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-319"],"published":"2026-10-11","updated":"2026-10-11","sourceUpdated":"2026-10-11T13:17:14.720","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108716","references":[{"url":"https://github.com/punkpeye/mcp-remote","label":"disclosure@vulncheck.com"},{"url":"https://github.com/punkpeye/mcp-remote/blob/v0.14.3/src/lib/client-credentials.ts#L37-L47","label":"disclosure@vulncheck.com"},{"url":"https://github.com/punkpeye/mcp-remote/blob/v0.14.3/src/lib/device-authorization.ts#L64-L170","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind03/punkpeye-mcp-remote-device-code-cleartext-oauth-transport","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/mcp-remote-0.8.0-through-0.14.3-cleartext-credential-transmission-via-device-code-oauth-grant","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-11T13:51:17.025Z","slug":"CVE-2026-108716","body":"## Overview\n\nmcp-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}