Out-of-bounds read in Apache Fory - CVE-2026-64609
Published: August 25, 2026
Vulnerability identifier: #VU145181
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64609
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in readAlignedVarUint() when processing out-of-band zero-copy java deserialization data. A remote attacker can supply crafted serialized input to disclose sensitive information.
Only applications that use the opt-in out-of-band zero-copy deserialization feature are affected.
Affected software
Apache Fory
How to mitigate CVE-2026-64609
Install security update from vendor's website.
Apache Fory - update to 1.4.0