CVE-2026-81101 Airtable MCP CLI before 0.2.5 Credential Disclosure via Unvalidated Configured Endpoint
Attackers can steal user access tokens by tricking them into configuring a malicious endpoint, as the CLI fails to validate the URL before sending credentials.
- 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-2026-81101?
CVE-2026-81101 is a medium-severity vulnerability in airtable-mcp-cli, published on 27 Aug 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
The configure command accepted any endpoint URL and stored it beside the user's access token. ConfigureCommand.execute in src/cli.ts persisted the value given to its endpoint option into the user profile without passing it through createSafeUrl in src/config.ts, the helper that already restricted the environment-variable form of the same setting to the vendor's own hosts over HTTPS. Because the connect path in src/mcp.ts attaches the stored token as a bearer credential on every request to the configured endpoint, a user who was persuaded to run configure with an endpoint of the attacker's choosing sent their personal access token to that destination on each subsequent invocation. Version 0.2.5 applies the same helper to the option.
Weakness: CWE-200
Which versions are affected by CVE-2026-81101?
How do I fix CVE-2026-81101?
No fix has been published for CVE-2026-81101 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-81101 being exploited?
There is no known exploitation of CVE-2026-81101 in the wild and no public exploit code.
Sources
Also known as GHSA-qxwr-hgm6-9xxf.