CVE-2026-41855
Spring Framework Unsafe Deserialization via Jackson JMS Converters
Description
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.
INFO
Published Date :
June 9, 2026, 5:16 a.m.
Last Modified :
July 23, 2026, 8:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | dcf2e128-44bd-42ed-91e8-88f912c1401d | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Spring Framework to a version that addresses the vulnerability.
- Validate message converter configurations.
- Limit deserialization of untrusted data.
- Implement secure coding practices for JMS.
Public PoC/Exploit Available at Github
CVE-2026-41855 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41855.
| URL | Resource |
|---|---|
| https://spring.io/security/cve-2026-41855 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41855 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41855
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41855 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41855 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: Spring Framework de Spring, Description: En un entorno JMS no confiable, org.springframework.jms.support.converter.MappingJackson2MessageConverter y org.springframework.jms.support.converter.JacksonJsonMessageConverter permiten la instanciación arbitraria de clases, lo que puede llevar a acciones no autorizadas a través de la deserialización de clases gadget. Versiones afectadas: Spring Framework 7.0.0 hasta 7.0.7; 6.2.0 hasta 6.2.18; 6.1.0 hasta 6.1.27; 5.3.0 hasta 5.3.48. -
Initial Analysis by [email protected]
Jun. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 5.3.0 up to (excluding) 5.3.49 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 6.1.0 up to (excluding) 6.1.28 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 6.2.0 up to (excluding) 6.2.18.1 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.0.7.1 Added Reference Type VMware: https://spring.io/security/cve-2026-41855 Types: Vendor Advisory -
CVE Modified by [email protected]
Jun. 27, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'Spring', 'product': 'Spring Framework', 'versions': [{'status': 'affected', 'version': '7.0.0', 'lessThan': '7.0.8', 'versionType': 'custom'}, {'status': 'affected', 'version': '6.2.0', 'lessThan': '6.2.19', 'versionType': 'custom'}, {'status': 'affected', 'version': '6.1.0', 'lessThan': '6.1.28', 'versionType': 'custom'}, {'status': 'affected', 'version': '5.3.0', 'lessThan': '5.3.49', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] [{'vendor': 'Spring', 'product': 'Spring Framework', 'versions': [{'status': 'affected', 'version': '7.0.0', 'lessThan': '7.0.7.1', 'versionType': 'custom'}, {'status': 'affected', 'version': '6.2.0', 'lessThan': '6.2.18.1', 'versionType': 'custom'}, {'status': 'affected', 'version': '6.1.0', 'lessThan': '6.1.28', 'versionType': 'custom'}, {'status': 'affected', 'version': '5.3.0', 'lessThan': '5.3.49', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Spring', 'product': 'Spring Framework', 'versions': [{'status': 'affected', 'version': '7.0.0', 'lessThan': '7.0.8', 'versionType': 'custom'}, {'status': 'affected', 'version': '6.2.0', 'lessThan': '6.2.19', 'versionType': 'custom'}, {'status': 'affected', 'version': '6.1.0', 'lessThan': '6.1.28', 'versionType': 'custom'}, {'status': 'affected', 'version': '5.3.0', 'lessThan': '5.3.49', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41855', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-09T00:00:00+00:00'} -
New CVE Received by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 Added Reference https://spring.io/security/cve-2026-41855