CVE-2026-41839
Spring Framework Escalation via Session Fixation in WebFlux
CVSS Score
4.2
EPSS Score
0.0%
EPSS Percentile
8th
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.
| CWE | CWE-384 |
| Vendor | spring |
| Product | spring framework |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jun 9, 2026 |
| Last Updated | Jun 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Spring / Spring Framework
7.0.0 < 7.0.8 6.2.0 < 6.2.19 6.1.0 < 6.1.28 5.3.0 < 5.3.49