Deserialization of Untrusted Data in Spring Batch - CVE-2026-47878
Published: August 28, 2026
Vulnerability identifier: #VU146236
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-47878
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to unsafe deserialization in DefaultExecutionContextSerializer when deserializing Base64-decoded data with ObjectInputStream.readObject() without a class allowlist. A remote attacker can supply a specially crafted serialized object to execute arbitrary code.
Only the JDBC job repository using this serializer is affected; the MongoDB backend and ResourcelessJobRepository are not affected.
Affected software
Spring Batch
How to mitigate CVE-2026-47878
Install security update from vendor's website.
Spring Batch - addressed in versions 5.2.7, 6.0.4.1, 6.0.5