CVE-2026-41838
Spring Framework Predictable Session ID in WebSocket Module
Description
IDs for WebSocket sessions in the spring-websocket module are not cryptographically unpredictable, which may be possible to exploit in combination with inadequate authorization rules. 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 | MEDIUM | dcf2e128-44bd-42ed-91e8-88f912c1401d | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Spring Framework to a non-vulnerable version.
- Apply available security patches for the affected module.
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-2026-41838.
| URL | Resource |
|---|---|
| https://spring.io/security/cve-2026-41838 | 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-2026-41838 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-2026-41838
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41838 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41838 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: Los IDs para sesiones WebSocket en el módulo spring-websocket no son criptográficamente impredecibles, lo que podría ser posible de explotar en combinación con reglas de autorización inadecuadas. Versiones afectadas: Spring Framework 7.0.0 a 7.0.7; 6.2.0 a 6.2.18; 6.1.0 a 6.1.27; 5.3.0 a 5.3.48. -
Modified Analysis by [email protected]
Jul. 17, 2026
Action Type Old Value New Value Changed 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) 6.2.19 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.0.8 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 -
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 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41838', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-09T13:39:36.187494Z'} -
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'}] -
Initial Analysis by [email protected]
Jun. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N 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) 6.2.19 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.0.8 Added Reference Type VMware: https://spring.io/security/cve-2026-41838 Types: Vendor Advisory -
New CVE Received by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added Description IDs for WebSocket sessions in the spring-websocket module are not cryptographically unpredictable, which may be possible to exploit in combination with inadequate authorization rules. 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:L/UI:R/S:U/C:H/I:N/A:N Added CWE CWE-330 Added Reference https://spring.io/security/cve-2026-41838