This Week in Spring - September 15th, 2026

Hi, Spring fans! Welcome to another rip-roarin' installment of This Week in Spring! I'm writing this to you from sun-kissed San Francisco, CA, sipping some coffee and watching the bay from my breakfast nook. What a wonderful day! A wonderful day in which to learn about the latest and greatest in...

Deserialization Of Untrusted Data

Spring Batch is vulnerable to Deserialization of Untrusted Data. The vulnerability is due to DefaultExecutionContextSerializer passing Base64-decoded data directly to ObjectInputStream.readObject without an ObjectInputFilter, which allows an attacker to provide malicious serialized objects and...

Resource Exhaustion

Spring Batch is vulnerable to resource exhaustion. The vulnerability is due to the way FlatFileItemReader assembles multi-line records, where a specially crafted input file can cause excessive CPU consumption and memory usage, leading the batch job to stall or run out of memory...

Deserialization RCE

Spring Batch is vulnerable to deserialization RCE. The vulnerability is due to the JobParameterDeserializer not properly enforcing the trusted-types allowlist, where applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer from an untrusted job repository can...

CVE-2026-47881

Spring Batch's FlatFileItemReader supports files where a single logical record spans multiple physical lines — for example, a CSV field that contains embedded newlines wrapped in quotes. A specially crafted input file could exploit the way the reader assembles those multi-line records to consume...

CVE-2026-47875

Applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer are vulnerable to a deserialization attack if they use an untrusted data source for the job repository. The JobParameterDeserializer does not properly enforce the trusted-types allowlist, allowing an...

CVE-2026-47878

DefaultExecutionContextSerializer, used by default 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. Spring Batch 6.0.0 - 6.0.4 Spring Batch 5.2.6 and earlier...

CVE-2026-47881

CVE-2026-47881 is a denial-of-service vulnerability in Spring Batch 's FlatFileItemReader (versions 4.3.0–4.3.13 , 5.2.0–5.2.6 , and 6.0.0–6.0.4 ). A specially crafted input file exploiting multi-line record assembly can cause excessive CPU and memory consumption, stalling or exhausting the batch...

CVE-2026-47881 Denial of Service in Spring Batch FlatFileItemReader via Malformed Input File

Spring Batch's FlatFileItemReader supports files where a single logical record spans multiple physical lines — for example, a CSV field that contains embedded newlines wrapped in quotes. A specially crafted input file could exploit the way the reader assembles those multi-line records to consume...

EUVD-2026-66844

Spring Batch's FlatFileItemReader supports files where a single logical record spans multiple physical lines — for example, a CSV field that contains embedded newlines wrapped in quotes. A specially crafted input file could exploit the way the reader assembles those multi-line records to consume...

CVE-2026-47881 Denial of Service in Spring Batch FlatFileItemReader via Malformed Input File

Spring Batch's FlatFileItemReader supports files where a single logical record spans multiple physical lines — for example, a CSV field that contains embedded newlines wrapped in quotes. A specially crafted input file could exploit the way the reader assembles those multi-line records to consume...

CVE-2026-47878 Unsafe Java deserialization in DefaultExecutionContextSerializer without class allowlist

DefaultExecutionContextSerializer, used by default 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. Spring Batch 6.0.0 - 6.0.4 Spring Batch 5.2.6 and earlier...

EUVD-2026-66841

DefaultExecutionContextSerializer, used by default 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. Spring Batch 6.0.0 - 6.0.4 Spring Batch 5.2.6 and earlier...

CVE-2026-47878 Unsafe Java deserialization in DefaultExecutionContextSerializer without class allowlist

DefaultExecutionContextSerializer, used by default 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. Spring Batch 6.0.0 - 6.0.4 Spring Batch 5.2.6 and earlier...

CVE-2026-47878

Spring Batch 's DefaultExecutionContextSerializer , used by default in the JDBC job repository, passes Base64-decoded bytes directly to ObjectInputStream.readObject() without an ObjectInputFilter restricting types to a trusted class allowlist. This enables deserialization of untrusted data (CWE-5...

CVE-2026-47875 JobParameterDeserializer bypasses the trusted-type allowlist

Applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer are vulnerable to a deserialization attack if they use an untrusted data source for the job repository. The JobParameterDeserializer does not properly enforce the trusted-types allowlist, allowing an...

EUVD-2026-66839

Applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer are vulnerable to a deserialization attack if they use an untrusted data source for the job repository. The JobParameterDeserializer does not properly enforce the trusted-types allowlist, allowing an...

CVE-2026-47875 JobParameterDeserializer bypasses the trusted-type allowlist

Applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer are vulnerable to a deserialization attack if they use an untrusted data source for the job repository. The JobParameterDeserializer does not properly enforce the trusted-types allowlist, allowing an...

CVE-2026-47875

Spring Batch (org.springframework.batch:spring-batch-core) versions 6.0.0–6.0.4 and 5.2.0–5.2.6 are vulnerable to deserialization of untrusted data in the JobParameterDeserializer. When Jackson2ExecutionContextStringSerializer is used with an untrusted job repository data source, the deserializer...

PT-2026-82395

Name of the Vulnerable Software and Affected Versions Spring Batch versions 6.0.0 through 6.0.4 Spring Batch versions 5.2.0 through 5.2.6 Description Applications using Jackson2ExecutionContextStringSerializer to deserialize execution contexts are susceptible to a deserialization attack when an...