CVE-2026-64606: CWE-502 Deserialization of Untrusted Data in Apache Software Foundation Apache Fory
Deserialization of untrusted data vulnerability that may allow class-registration checks to be bypassed during Java lambda deserialization. Only lambda capture class is affected This issue affects Apache Fory: from before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.
AI Analysis
Technical Summary
This vulnerability in Apache Fory involves improper handling of Java lambda deserialization, where class-registration checks can be bypassed for the lambda capture class. This flaw is present in all versions prior to 1.4.0. The vendor has released version 1.4.0 to address this issue. The vulnerability is categorized under CWE-502 (Deserialization of Untrusted Data).
Potential Impact
The vulnerability could allow an attacker to bypass class-registration checks during deserialization of Java lambda expressions, potentially leading to unsafe deserialization behavior. However, only the lambda capture class is affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache Fory to version 1.4.0 or later, where this vulnerability has been fixed. Since this is a cloud service, the vendor manages remediation for the cloud-hosted service; users should verify with the vendor that their environment is updated accordingly.
CVE-2026-64606: CWE-502 Deserialization of Untrusted Data in Apache Software Foundation Apache Fory
Description
Deserialization of untrusted data vulnerability that may allow class-registration checks to be bypassed during Java lambda deserialization. Only lambda capture class is affected This issue affects Apache Fory: from before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.
CVSS v3.1
Score 9.8critical
Affected software
pkg:maven/Apache Software Foundation/org.apache.fory:fory-corepkg:maven/Apache Software Foundation/org.apache.fury:fury-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Fory involves improper handling of Java lambda deserialization, where class-registration checks can be bypassed for the lambda capture class. This flaw is present in all versions prior to 1.4.0. The vendor has released version 1.4.0 to address this issue. The vulnerability is categorized under CWE-502 (Deserialization of Untrusted Data).
Potential Impact
The vulnerability could allow an attacker to bypass class-registration checks during deserialization of Java lambda expressions, potentially leading to unsafe deserialization behavior. However, only the lambda capture class is affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache Fory to version 1.4.0 or later, where this vulnerability has been fixed. Since this is a cloud service, the vendor manages remediation for the cloud-hosted service; users should verify with the vendor that their environment is updated accordingly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-07-20T08:21:55.786Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
Threat ID: 6a5f50912a4a8d5989007f17
Added to database: 07/21/2026, 10:57:21 UTC
Last enriched: 07/21/2026, 11:12:14 UTC
Last updated: 07/21/2026, 13:57:29 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.