CVE-2026-66055 Apache Software Foundation CVE debrief

Who should care

Defenders responsible for Apache Thrift deployments should assess exposure and prioritize upgrading to version 0.25.0. This includes reviewing affected systems, verifying version numbers, and applying the necessary updates. Additionally, defenders should monitor for potential exploitation attempts and review compensating controls for exposed systems. Security teams and vulnerability management teams should also be aware of the potential impact and take pro

Why it matters

CVE-2026-66055 is a high-severity vulnerability in Apache Thrift that could lead to resource exhaustion. Defenders should assess exposure, prioritize upgrading to version 0.25.0, and monitor for potential exploitation attempts.

• Potential for resource exhaustion
• Need for version verification and upgrade
• Possible impact on system availability

Technical summary

The CVE record describes an Allocation of Resources Without Limits or Throttling vulnerability in Apache Thrift C++, Java, Go, netstd, Python, and Delphi bindings before version 0.25.0. This vulnerability could lead to resource exhaustion if exploited, potentially impacting system availability. Defenders should assess exposure, prioritize upgrading to version 0.25.0, and monitor for potential exploitation attempts. The vulnerability highlights the importance of version verification and timely updates to prevent potential security breaches.

Defensive priority

Upgrade to version 0.25.0 to fix the Allocation of Resources Without Limits or Throttling vulnerability in Apache Thrift.

Recommended defensive actions

• Upgrade to Apache Thrift version 0.25.0
• Review and update affected systems
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• technicalSummary

Evidence notes

The CVE record and NVD entry provide information on the vulnerability and its impact. However, further details on affected systems and potential exploitation are limited. Defenders should verify the affected Apache Thrift deployments, review system configurations, and assess potential exposure. The lack of detailed information on exploitation attempts or successful attacks highlights the need for vigilance and proactive security measures.

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.