Google’s AppSheet platform had a critical deserialization vulnerability that allowed remote code execution, risking data theft and server compromise. Thanks to responsible disclosure, the flaw was patched, protecting millions of users. #GoogleAppSheet #DeserializationVulnerability
Keypoints
- A deserialization flaw was discovered in Google AppSheet’s automation feature in September 2022.
- The vulnerability enabled arbitrary PowerShell commands to be executed on Google’s servers.
- Attackers could exploit this to spawn system processes, steal data, or deploy malware.
- Google fixed the issue by enforcing type whitelisting and sanitizing payloads before processing.
- Developers should validate input, avoid deserializing untrusted data, and monitor backend requests.