CVE-2026-47878 Spring CVE debrief

Who should care

Defenders and security teams responsible for Spring Batch deployments should assess their exposure and prioritize patching or updating affected versions. They should also review security configurations to prevent potential exploitation and verify the affected versions in their environment. Security teams should track exceptions, retest remediated assets, and close the item only after evidence is documented.

Why it matters

CVE-2026-47878 is a medium-severity vulnerability in Spring Batch that requires verification of affected versions and prompt patching or updating to prevent potential code execution.

• Potential code execution due to lack of ObjectInputFilter
• Possible security risks if not patched or updated
• Verification of affected versions required

Technical summary

The DefaultExecutionContextSerializer class in Spring Batch's JDBC job repository passes Base64-decoded bytes directly to ObjectInputStream.readObject() without an ObjectInputFilter that restricts types to a trusted class allowlist. This allows for potential code execution due to the lack of input validation and filtering. The affected versions of Spring Batch include 5.2.6 and earlier, as well as 6.0.0 through 6.0.4. Defenders should prioritize verifying the affected versions in their environment and applying necessary patches or updates.

Defensive priority

Defenders should prioritize verifying the affected versions of Spring Batch in their environment and applying the necessary patches or updates.

Recommended defensive actions

• Verify the version of Spring Batch in use and check if it is affected by the vulnerability.
• Apply patches or updates to affected versions of Spring Batch.
• Review and update security configurations for Spring Batch to prevent potential exploitation.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, its impact, and affected versions. Defenders should verify the affected Spring Batch versions in their environment and review security configurations to prevent potential exploitation. The lack of ObjectInputFilter allows for potential code execution, and defenders should prioritize patching or updating affected versions. Evidence from the CVE record and NVD page indicates that the vulnerability affects Spring Batch versions 5.2.6 and earlier, 6

Sources and 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.