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CVE-2026-41731— In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization

Quick assessment

Affected
Spring Spring for Apache Kafka
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

VMware Spring for Apache Kafka是美国威睿（VMware）公司的一个Kafka消息集成框架。 VMware Spring for Apache Kafka 4.0.0及之前版本、3.3.0及之前版本、3.2.0及之前版本、2.9.0及之前版本和2.8.0及之前版本存在代码问题漏洞，该漏洞源于JsonKafkaHeaderMapper和DefaultKafkaHeaderMapper使用前缀检查匹配类型标头，可能导致生产者提供特制标头值导致消费者反序列化任意JDK类型。

CVSS 8.1 · High EPSS 0.65% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
Spring Spring for Apache Kafka 4.0.0< 4.0.5.1 affected
3.3.0< 3.3.15.1 affected
3.2.0< 3.2.14 affected
2.9.0< 2.9.14 affected
2.8.0< 2.8.12 affected
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I. Basic Information for CVE-2026-41731

Vulnerability Information
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Vulnerability Title
In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
JsonKafkaHeaderMapper and the deprecated DefaultKafkaHeaderMapper matched type headers against trusted packages using a prefix check, meaning that trusting any package implicitly trusted all of its subpackages. Combined with Jackson's default bean deserialization, a producer could supply crafted header values that caused the consumer to deserialize arbitrary JDK types. Affected versions: Spring for Apache Kafka 4.0.0 through 4.0.5; 3.3.0 through 3.3.15; 3.2.0 through 3.2.13; 2.9.0 through 2.9.13; 2.8.0 through 2.8.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
VMware Spring for Apache Kafka 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VMware Spring for Apache Kafka是美国威睿（VMware）公司的一个Kafka消息集成框架。 VMware Spring for Apache Kafka 4.0.0及之前版本、3.3.0及之前版本、3.2.0及之前版本、2.9.0及之前版本和2.8.0及之前版本存在代码问题漏洞，该漏洞源于JsonKafkaHeaderMapper和DefaultKafkaHeaderMapper使用前缀检查匹配类型标头，可能导致生产者提供特制标头值导致消费者反序列化任意JDK类型。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Spring for Apache Kafka 4.0.0 ~ 4.0.5.1 -

II. Public POCs for CVE-2026-41731

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III. Intelligence Information for CVE-2026-41731

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Vendor Advisories for CVE-2026-41731 (1)

Same Patch Batch · Spring · 2026-06-09 · 51 CVEs total

CVE-2026-41732 8.1 HIGH In Spring for Apache Pulsar, overly broad trusted-package matching in header mapper expose
CVE-2026-41729 8.1 HIGH Spring Data REST SpEL Injection via Map Key in JSON Patch
CVE-2026-41855 8.1 HIGH Spring Framework Unsafe Deserialization via Jackson JMS Converters
CVE-2026-41717 8.1 HIGH Spring Data MongoDB - SpEL Expression Injection via Annotated Query Parameter Binding
CVE-2026-41003 7.6 HIGH Unencoded HTML Outputs in Spring Security May Allow Cross-Site Scripting
CVE-2026-40984 7.5 HIGH Micrometer HTTP server instrumentations DoS vulnerability
CVE-2026-41842 7.5 HIGH Spring Framework Denial of Service via Versioned Resources in Spring MVC and WebFlux
CVE-2026-41850 7.5 HIGH Spring Framework Algorithmic Denial of Service via SpEL Expressions
CVE-2026-41007 7.5 HIGH Spring HATEOAS heap exhaustion through unbounded internal caching
CVE-2026-41006 7.5 HIGH Spring HATEOAS Collection+JSON/UBER deserializers do not honor Jackson configuration
CVE-2026-41728 7.5 HIGH Spring Data REST JSON Patch bypasses Jackson read-only property protection on nested objec
CVE-2026-41695 7.5 HIGH Denial of Service in Spring Data Commons Property Path Resolution
CVE-2026-41716 7.5 HIGH Spring Data web support unbounded negative-result cache keyed on attacker-supplied propert
CVE-2026-40988 7.5 HIGH Unbounded DEFLATE Inflation in SAML 2.0 Service Provider
CVE-2026-40983 7.5 HIGH Micrometer gRPC server instrumentation DoS vulnerability
CVE-2026-41849 7.5 HIGH Spring Framework Denial of Service via Integer Overflow in SpEL Expressions
CVE-2026-41720 7.4 HIGH Authentication Bypass with Empty Password in Spring LDAP
CVE-2026-40993 7.3 HIGH Unfiltered Java Native Deserialization of SAML 2.0 Asserting Party Credentials BLOB Databa
CVE-2026-41845 7.1 HIGH Spring Framework Cross-site Scripting via JavaScriptUtils
CVE-2026-47838 6.8 MEDIUM Unauthorized User Impersonation when Using X.509 Client Certificates

Showing top 20 of 51 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Spring for Apache Kafka
Same vendor: Spring
Same weakness: CWE-502

V. Comments for CVE-2026-41731

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