CVE-2026-41839
published 2026-06-09CVE-2026-41839: A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a…
PriorityP418medium4.2CVSS 3.1
AVNACHPRNUIRSUCLILAN
EPSS
0.20%
9.7th percentile
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
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| spring | spring_framework | >= 5.3.0 < 5.3.49 | 5.3.49 |
| spring | spring_framework | >= 6.1.0 < 6.1.28 | 6.1.28 |
| spring | spring_framework | >= 6.2.0 < 6.2.18.1 | 6.2.18.1 |
| spring | spring_framework | >= 7.0.0 < 7.0.7.1 | 7.0.7.1 |
| vmware | spring_framework | < 5.3.49 | 5.3.49 |
| vmware | spring_framework | >= 6.1.0 < 6.1.28 | 6.1.28 |
| vmware | spring_framework | >= 6.2.0 < 6.2.19 | 6.2.19 |
| vmware | spring_framework | >= 7.0.0 < 7.0.8 | 7.0.8 |
CVSS provenance
nvdv3.14.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
vendor_redhat4.2MEDIUM
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GHSA
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 authenti
ghsa_unreviewed·2026-06-09
CVE-2026-41839 [MEDIUM] CWE-384 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 authenti
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.
Red Hat
spring-framework: Spring Framework: Privilege escalation via session ID exchange in WebFlux applications
vendor_redhat·2026-06-09·CVSS 4.2
CVE-2026-41839 [MEDIUM] CWE-79 spring-framework: Spring Framework: Privilege escalation via session ID exchange in WebFlux applications
spring-framework: Spring Framework: Privilege escalation via session ID exchange in WebFlux applications
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.
A flaw was found in Spring Framework. A remote attacker, by compromising a subdomain of a WebFlux application (for example, through cross-site scripting (XSS)), could exploit this vulnerability to escalate privileges. This allows the attacker to exchange a known session ID for that of an authenticated user, potentially leading to unauthorized access to the
No detection rules found.
No public exploits indexed.
2026-06-09
Published