CVE-2026-48767 baptisteArno CVE debrief

Who should care

Defenders responsible for managing TypeBot workspaces and Google Sheets OAuth integrations should assess exposure and prioritize remediation. This includes reviewing workspace configurations, restricting guest access, and ensuring that guest members do not have elevated access. Additionally, defenders should verify that TypeBot is upgraded to version 3.17.0 or later to prevent exploitation.

Why it matters

CVE-2026-48767 allows low-privilege TypeBot workspace guests to obtain live Google Sheets OAuth access tokens, enabling potential unauthorized data access or token misuse. Defenders should verify workspace configurations, restrict guest access, and upgrade to version 3.17.0 or later.

• Potential unauthorized access to Google Sheets data.
• Possible misuse of OAuth access tokens outside Typebot.
• Need for verification of workspace configurations and guest member access.
• Priority on upgrading to version 3.17.0 or later.

Technical summary

The vulnerability in TypeBot allows a low-privilege guest member of a workspace to obtain a live Google Sheets OAuth access token by calling the Google Sheets helper `getAccessToken`. This is possible because the vulnerable path only checks for read access to the workspace, decrypts the stored Google OAuth credential, refreshes or retrieves the access token, and returns the raw bearer token directly to the caller.

Defensive priority

Defenders should prioritize verifying workspace configurations, ensuring that guest members do not have elevated access, and upgrading to version 3.17.0 or later.

Recommended defensive actions

• Verify and restrict workspace configurations to prevent guest members from accessing sensitive data.
• Upgrade TypeBot to version 3.17.0 or later to patch the vulnerability.
• Monitor Google Sheets OAuth access token usage for anomalies.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The vulnerability is confirmed in TypeBot versions prior to 3.17.0. The issue allows a low-privilege guest member to obtain a live Google Sheets OAuth access token. The fix is included in version 3.17.0.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.