CVE-2026-41839
Spring Framework Escalation via Session Fixation in WebFlux
Description
A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user. 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] |
Solution
- Update Spring Framework to versions 7.0.8 or higher.
- Update Spring Framework to versions 6.2.19 or higher.
- Update Spring Framework to versions 6.1.28 or higher.
- Update Spring Framework to versions 5.3.49 or higher.
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-2026-41839.
| URL | Resource |
|---|---|
| https://spring.io/security/cve-2026-41839 | 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-2026-41839 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-2026-41839
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-2026-41839 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41839 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: Una aplicación WebFlux con un subdominio comprometido (por ejemplo, comprometido mediante cross-site scripting (XSS)) es vulnerable a un ataque de escalada que intercambia un ID de sesión conocido por el de un usuario autenticado. 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]
Jul. 14, 2026
Action Type Old Value New Value Added CPE Configuration OR *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 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions up to (excluding) 5.3.49 Added Reference Type VMware: https://spring.io/security/cve-2026-41839 Types: Vendor Advisory -
CVE Modified by [email protected]
Jun. 23, 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-2026-41839', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-09T13:30:25.839375Z'} -
New CVE Received by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added Description A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user. 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:R/S:U/C:L/I:L/A:N Added CWE CWE-384 Added Reference https://spring.io/security/cve-2026-41839