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TI-2026-70695 Aliases CVE-2026-108716GHSA-jrvg-vw6c-rp59

mcp-remote Cleartext Credential Transmission in Device-Code OAuth Flow

Priority LOW 26CWE-319Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-319.

Summary

mcp-remote from 0.8.0 through 0.14.3 sends client secrets and receives tokens over cleartext HTTP in its authorizeWithDeviceCode OAuth device-code flow when the discovered device authorization and token endpoints are non-loopback http URLs. An on-path network attacker can capture the client secret and the issued access and refresh tokens. The weakness is classified as CWE-319. The vulnerability is not listed in CISA KEV and no public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
punkpeyemcp-remote0.8.0 – 0.14.3—No fix listedCNA
  • mcp-remote Vendorpunkpeye Affected 0.8.0 – 0.14.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for mcp-remote.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-11 Threatist record created from CVE-2026-108716
  2. 2026-10-11 Alias added: GHSA-jrvg-vw6c-rp59
  3. 2026-10-12 Priority changed: MEDIUM → LOW
  4. 2026-10-13 CISA SSVC decision points changed

References

Advisory 1

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences