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CVE-2026-64608 Apache CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-21T10:16:24.923Z and has not been modified since then. The vulnerability is a heap type confusion and out-of-bounds read/write in the Apache Fory C++ implementation. When deserializing data in compatible mode, the field-skip paths do not correctly validate the declared field types against the actual data, so input with an inconsistent schema can cause type confusion and out-of-bounds memory access. Only the C++ implementation is affected; other language implementations of Apache Fory are not. Affected versions are from 0.14.0 before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.

Vendor
Apache
Product
Fory
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-21
Original CVE updated
2026-08-11
Advisory published
2026-07-21
Advisory updated
2026-08-11

Who should care

Users of Apache Fory C++ from version 0.14.0 to 1.3.9 should be aware of this vulnerability and take steps to upgrade to version 1.4.0. Operators, platform administrators, vulnerability management teams, and security teams should review the affected scope and take necessary actions. They should also verify affected systems, plan for upgrades, and monitor for potential exploitation attempts.

Technical summary

Heap type confusion and out-of-bounds read/write in the Apache Fory C++ implementation. When deserializing data in compatible mode, the field-skip paths do not correctly validate the declared field types against the actual data, so input with an inconsistent schema can cause type confusion and out-of-bounds memory access. Only the C++ implementation is affected; other language implementations of Apache Fory are not. Affected versions are from 0.14.0 before 1.4.0. The vulnerability can be mitigated by upgrading to version 1.4.0.

Defensive priority

Upgrade to version 1.4.0 to fix the issue.

Recommended defensive actions

  • Upgrade to version 1.4.0
  • Inventory and check affected systems
  • Monitor for potential exploitation attempts
  • Review compensating controls for exposed systems
  • Check relevant monitoring, detection, and logs for exposed assets
  • Track exceptions and retest remediated assets
  • Confirm whether affected product deployments exist in managed environments

Evidence notes

The issue affects Apache Fory C++: from 0.14.0 before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue. Limited information available. Evidence is limited to public sources and CVE details. Defenders should verify affected systems and plan for upgrades. The CVE record was published on 2026-07-21T10:16:24.923Z and has not been modified since then. This CVE record provides details about the vulnerability, its impact, and recommended actions.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-64608 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-64608

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

  • CVE-2026-64608 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-64608

    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.