PatchSiren cyber security CVE debrief
CVE-2026-66053 Apache Software Foundation CVE debrief
CVE-2026-66053 is an Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift Python bindings. The issue affects Apache Thrift before version 0.24.0, potentially impacting users of affected versions. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This CVE replaces CVE-2026-41603. The vulnerability has a CVSS score of 5.9 and is classified as MEDIUM severity.
- Vendor
- Apache Software Foundation
- Product
- Apache Thrift
- CVSS
- MEDIUM 5.9
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-27
- Original CVE updated
- 2026-07-27
- Advisory published
- 2026-07-27
- Advisory updated
- 2026-07-27
Who should care
Users of Apache Thrift Python bindings before version 0.24.0, operators of affected systems, and security teams should be aware of this vulnerability and take action to upgrade to version 0.24.0. Affected product deployments in managed environments require review and potential updates.
Technical summary
The vulnerability is caused by improper validation of certificates with host mismatch in Apache Thrift Python bindings. This can lead to potential security issues when using the affected versions of Apache Thrift. The issue has been fixed in version 0.24.0. Users of Apache Thrift Python bindings before version 0.24.0 should be aware of this vulnerability and take action to upgrade. Affected product deployments in managed environments require review and potential updates to ensure secure configurations and prevent potential security breaches. Evidence of exposure is limited, and defenders should verify affected product deployments. This CVE replaces CVE-2026-41603.
Defensive priority
Medium priority due to the CVSS score of 5.9 and the availability of a fix in version 0.24.0.
Recommended defensive actions
- Upgrade to Apache Thrift version 0.24.0 or later
- Review and update affected systems and dependencies
- Monitor for potential security issues related to certificate validation
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
- 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
Evidence notes
The CVE record was published on 2026-07-27T12:16:55.027Z and has not been modified since then. The NVD entry is currently in the 'Received' status. The Apache Thrift Python bindings vulnerability affects users who have not upgraded to version 0.24.0. Evidence of exposure is limited, and defenders should verify affected product deployments. The CVE replaces CVE-2026-41603.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-27T12:16:55.027Z and has not been modified since then. The NVD entry is currently in the 'Received' status.