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CVE-2026-55971 Apache Software Foundation CVE debrief

CVE-2026-55971 is a Heap-based Buffer Overflow vulnerability in Apache Thrift C++ bindings. The issue affects Apache Thrift before version 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This vulnerability has a CVSS score of 9.3 and is considered CRITICAL. Affected product deployments should be identified and owners assigned for follow-up.

Vendor
Apache Software Foundation
Product
Apache Thrift
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-07-28
Advisory published
2026-07-27
Advisory updated
2026-07-28

Who should care

Users of Apache Thrift C++ bindings before version 0.24.0 should be aware of this vulnerability and take steps to upgrade. Affected operator, platform, vulnerability-management, and security-team impact should be reviewed.

Technical summary

A Heap-based Buffer Overflow vulnerability exists in Apache Thrift C++ bindings. This issue affects Apache Thrift before version 0.24.0. The vulnerability has a CVSS score of 9.3 and is considered CRITICAL. Users of Apache Thrift C++ bindings before version 0.24.0 should be aware of this vulnerability and take steps to upgrade. Affected deployments should be identified, and owners assigned for follow-up. Defenders should verify affected Apache Thrift C++ bindings deployments and review vendor guidance. Evidence is limited to CVE and NVD details, so verification of affected scope and severity is recommended.

Defensive priority

High priority should be given to upgrading Apache Thrift C++ bindings to version 0.24.0 or later.

Recommended defensive actions

  • Upgrade Apache Thrift C++ bindings to version 0.24.0 or later.
  • Review and update affected systems and applications.
  • 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.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-07-27T12:16:46.110Z and has not been modified since then. The NVD entry is currently 9.3 CRITICAL. Evidence is limited to CVE and NVD details. Defenders should verify affected Apache Thrift C++ bindings deployments and review vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-55971 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-55971

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-55971 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-55971

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.