CVE-2026-108716 mcp-remote 0.8.0 through 0.14.3 Cleartext Credential Transmission via --device-code OAuth Grant
On-path attackers can capture client secrets and OAuth tokens because the tool transmits credentials over cleartext HTTP during device code authorization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-108716?
CVE-2026-108716 is a medium-severity vulnerability in punkpeye mcp-remote, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-319
Which versions are affected by CVE-2026-108716?
How do I fix CVE-2026-108716?
No fix has been published for CVE-2026-108716 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-108716 being exploited?
There is no known exploitation of CVE-2026-108716 in the wild and no public exploit code.
Sources
Also known as GHSA-jrvg-vw6c-rp59.