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CVE-2026-41855 — Vulnerability in org.springframework:spring-jms —...

HIGH

Spring Framework Unsafe Deserialization via Jackson JMS Converters

Published June 9, 2026Updated September 8, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published June 9, 2026 (125 days ago).
  • Last revised September 8, 2026 — 91 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.springframework:spring-jms to 6.2.19 or later
<!-- Update pom.xml dependency version to 6.2.19 for org.springframework:spring-jms -->
Maven
Update org.springframework:spring-jms to 7.0.8 or later
<!-- Update pom.xml dependency version to 7.0.8 for org.springframework:spring-jms -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (4)

Affects 1 ecosystem: maven (1).

PackageEcosystemAffectedFixed In
org.springframework:spring-jms
maven
6.0.0, 6.0.1, 6.0.10, 6.0.11 (+42 more)Range-based data available
org.springframework:spring-jms
maven
2.0, 2.0-m5, 2.0-rc1, 2.0-rc2 (+219 more)Range-based data available
org.springframework:spring-jms
maven
6.2.0, 6.2.1, 6.2.10, 6.2.11 (+15 more)6.2.19
org.springframework:spring-jms
maven
7.0.0, 7.0.0-M1, 7.0.0-M2, 7.0.0-M3 (+16 more)7.0.8

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-502
    Deserialization of Untrusted DataMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.1 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2026-41855?
Spring Framework Unsafe Deserialization via Jackson JMS Converters This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.1/10).
How do I check if my project is affected by CVE-2026-41855?
CVE-2026-41855 affects org.springframework:spring-jms. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-41855 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.1

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-x863-p983-p4f7

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