CVE-2026-41855 PUBLISHED

Spring Framework Unsafe Deserialization via Jackson JMS Converters

Assigner: vmware
Reserved: 22.04.2026 Published: 09.06.2026 Updated: 09.06.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Spring
Product	Spring Framework
Versions	Default: unaffected affected from 7.0.0 to 7.0.8 (excl.) affected from 6.2.0 to 6.2.19 (excl.) affected from 6.1.0 to 6.1.28 (excl.) affected from 5.3.0 to 5.3.49 (excl.)

References

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

Problem Types

CWE-502: Deserialization of Untrusted Data CWE

Impacts

In an untrusted JMS environment, MappingJackson2MessageConverter and JacksonJsonMessageConverter allow arbitrary class instantiation via gadget class deserialization, potentially leading to unauthorized actions.