CVE-2026-108716CWE-319

CVE-2026-108716

Medium · published October 11, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
9.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00200 · 9.3th percentile
Weakness
CWE-319 · Cleartext Transmission of Sensitive Information
Published
2026-10-11T17:17Z
References (5)
https://github.com/punkpeye/mcp-remote · [email protected]https://github.com/punkpeye/mcp-remote/blob/v0.14.3/src/lib/client-credentials.ts#L37-L47 · [email protected]https://github.com/punkpeye/mcp-remote/blob/v0.14.3/src/lib/device-authorization.ts#L64-L170 · [email protected]https://hackmd.io/@haind03/punkpeye-mcp-remote-device-code-cleartext-oauth-transport · [email protected]https://www.vulncheck.com/advisories/mcp-remote-0.8.0-through-0.14.3-cleartext-credential-transmission-via-device-code-oauth-grant · [email protected]
EPSS history
Timeline
  • 13 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 11 OCT 12:19Z
    mcp-remote 0.8.0 through 0.14.3 Cleartext Credential Transmission via --device-code OAuth Grant
    cvelistv5
  • 11 OCT 12:19Z
    mcp-remote 0.8.0 through 0.14.3 Cleartext Credential Transmission via --device-code OAuth Grant
    cvelistv5