Spring Framework Unsafe Deserialization via Jackson JMS Converters
CVE-2026-41855

8.1HIGH

Key Information:

Vendor

Spring

Status
Spring Framework
Vendor
CVE Published:
9 June 2026

What is CVE-2026-41855?

In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization.

Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

Affected Version(s)

Spring Framework 7.0.0 < 7.0.8

Spring Framework 6.2.0 < 6.2.19

Spring Framework 6.1.0 < 6.1.28

References

https://spring.io/security/cve-2026-41855

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.