# CVE-2026-41839

## Summary

- **CVE ID:** CVE-2026-41839
- **Severity:** MEDIUM
- **CVSS Score:** 4.2 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N)
- **CWE:** CWE-384
- **Published:** Jun 9, 2026
- **Last Modified:** Jun 23, 2026

## 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.

## Affected Products

- Spring — Spring Framework (7.0.0)
- Spring — Spring Framework (6.2.0)
- Spring — Spring Framework (6.1.0)
- Spring — Spring Framework (5.3.0)

## References

- [CNA](https://spring.io/security/cve-2026-41839)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 11.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._