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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-319"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108716.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0.8.0"
},
{
"last_affected": "0.14.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0.8.0"
},
{
"last_affected": "0.14.3"
}
],
"source": "DESCRIPTION"
}
]
}