CVE-2026-66055: Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: TJSONProtocol accepts a single JSON string/number exceeding the configured size limit (multi-language)
Allocation of Resources Without Limits or Throttling vulnerability in Apache Thrift C++, Java, Go, netstd, Python and Delphi bindings.
This issue affects Apache Thrift: before 0.25.0.
Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Other sources
Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: TJSONProtocol accepts a single JSON string/number exceeding the configured size limit (multi-language)
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 1.31.0-34 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 0.25.0-1 - Upgrade
Upgrade
Apache Thriftto a version that resolves this vulnerability.Fixed in 0.25.0
Event History
Frequently Asked Questions
Which Apache Thrift bindings are affected?
The affected bindings are C++, Java, Go, netstd, Python, and Delphi. The issue affects Apache Thrift versions before 0.25.0.
What configuration or input condition is relevant to exploitation?
The issue involves TJSONProtocol accepting a single JSON string or number that exceeds the configured size limit. An attacker would need to supply such oversized JSON data to a service using the affected protocol implementation.
What should teams do to remediate the issue?
Upgrade Apache Thrift to version 0.25.0, which fixes the issue. The provided information does not specify an alternative mitigation for environments that cannot upgrade immediately.