Read the docs
TI-2026-36874 Aliases CVE-2026-50076GHSA-8f39-v287-78jf

Apache Fory: Java ReplaceResolverSerializer deserialization checks bypass

Priority MEDIUM 48CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

Deserialization of Untrusted Data in the Java replace-resolve path in Apache Fory fory-core Java SDK before 1.1.0 on Java/JVM platforms allows a remote attacker to bypass class registration, TypeChecker, and DisallowedList checks and invoke classpath-present readResolve/readExternal hooks via crafted Fory serialized data. Users are recommended to upgrade to version 1.1.0 or later, which fixes this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0052 44th percentileScored 2026-11-07
Fix Fixed Apache Fory (Apache Software Foundation): 1.1.0org.apache.fory:fory-core (Maven): 1.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Forybefore 1.1.01.1.0Patch availableCNA
—org.apache.fory:fory-core (Maven)before 1.1.01.1.0Patch availableGHSA-8f39-v287-78jf
  • Apache Fory VendorApache Affected before 1.1.0 Fixed in 1.1.0 Patch available CNA
  • org.apache.fory:fory-core (Maven) Vendor— Affected before 1.1.0 Fixed in 1.1.0 Patch available GHSA-8f39-v287-78jf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:fory:*:*:*:*:*:*:*:*before 1.1.0VulnerableApache
  • cpe:2.3:a:apache:fory:*:*:*:*:*:*:*:* Versions before 1.1.0 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Fory (Apache Software Foundation) Fixed in 1.1.0
  • Fix · GHSA-8f39-v287-78jf org.apache.fory:fory-core (Maven) Fixed in 1.1.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50076
  2. 2026-10-03 Alias added: GHSA-8f39-v287-78jf
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 3

Other 1

  • TI-2025-38065 Apache Fory, Apache Fory: Python RCE via unguarded pickle fallback serializer in pyfory CVSS 3.1CRITICAL 9.8
  • TI-2026-50130 Apache Fory: Heap type confusion in C++ polymorphic smart-pointer deserialization CVSS 3.1CRITICAL 9.8
  • TI-2026-46171 Apache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip paths CVSS 3.1CRITICAL 9.8
  • TI-2026-46169 Apache Fory, Apache Fory: Class-registration bypass through an auto-admitted SerializedLambda capturing interface CVSS 3.1CRITICAL 9.8
  • TI-2026-35617 Apache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement CVSS 3.1CRITICAL 9.8
  • TI-2026-50132 Apache Fory: Out-of-bounds heap read in C++ struct deserializer tagged-int fast-path CVSS 3.1CRITICAL 9.1
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences