CVE-2026-41839
Last modified
CVE-2026-41839 is a medium-severity vulnerability rated 4.2/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Vmware | Spring Framework | < 5.3.49 |
| Vmware | Spring Framework | >= 6.1.0, < 6.1.28 |
| Vmware | Spring Framework | >= 6.2.0, < 6.2.19 |
| Vmware | Spring Framework | >= 7.0.0, < 7.0.8 |
References
- https://spring.io/security/cve-2026-41839Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-41839?
How severe is CVE-2026-41839?
How do I fix CVE-2026-41839?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-4180A vulnerability was identified in D-Link DIR-816 1.10CNB05. …9.8
- CVE-2026-4181A security flaw has been discovered in D-Link DIR-816 1.10CN…9.8
- CVE-2026-4182A weakness has been identified in D-Link DIR-816 1.10CNB05. …9.8
- CVE-2026-4183A security vulnerability has been detected in D-Link DIR-816…9.8
- CVE-2026-41837Spring Data REST's Querydsl integration accepts arbitrary pe…5.3
- CVE-2026-41838IDs for WebSocket sessions in the spring-websocket module ar…7.5
- CVE-2026-4184A vulnerability was detected in D-Link DIR-816 1.10CNB05. Af…9.8
- CVE-2026-41840Spring WebFlux applications are vulnerable to Denial of Serv…5.9
- CVE-2026-41841Spring MVC and WebFlux applications are vulnerable to Inform…5.9
- CVE-2026-41842Spring MVC and WebFlux applications are vulnerable to Denial…7.5
- CVE-2026-41843Spring MVC and WebFlux applications are vulnerable to Path T…5.9
- CVE-2026-41844A Spring MVC or Spring WebFlux application which configures …6.1
Are you affected by CVE-2026-41839?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST