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9.8
CVE-2026-47892: Spring Framework lets WebFlux header check be bypassed
CVE-2026-47892 · published 1 month ago
Summary
Versions of Spring Framework from 5.2.5 through 7.0.8 may allow a specially crafted web request to skip normal header validation in WebFlux applications that use functional endpoints. This could let an attacker make the server treat a request as trusted when it is not, potentially exposing data or actions. Update Spring to the latest release or apply the vendor's recommended patch to close the gap.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| – | spring | spring framework | <= 7.0.8 |
| Ubuntu:Pro:14.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:22.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:24.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:26.04:LTS | canonical | libspring-java | All versions |
| – | vmware | spring_framework |
>= 5.2.5, < 5.2.26 >= 5.3.0, < 5.3.50 >= 6.0.0, < 6.0.31 >= 6.1.0, < 6.1.29 >= 6.2.0, < 6.2.20 >= 7.0.0, < 7.0.8.1 cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* |
Original advisory text
Spring Framework Header Predicate Bypass in WebFlux Functional Endpoints
A WebFlux application using functional endpoints and deployed with DispatcherServlet may be vulnerable to a header predicate bypass in a pre-flight request.
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19
Spring Framework 6.1.0 - 6.1.28
Spring Framework 6.0.0 - 6.0.30
Spring Framework 5.3.0 - 5.3.49
Spring Framework 5.2.5.RELEASE - 5.2.25.RELEASE
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19
Spring Framework 6.1.0 - 6.1.28
Spring Framework 6.0.0 - 6.0.30
Spring Framework 5.3.0 - 5.3.49
Spring Framework 5.2.5.RELEASE - 5.2.25.RELEASE
References
- https://spring.io/security/cve-2026-47892 Vendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-47892 Third Party Advisory
- https://ubuntu.com/security/CVE-2026-47892 Third Party Advisory
Severity
9.8
Critical
CVSS 3.1: 9.8 (OSV)
Exploitation
EPSS <1%
Type
CWE-863Incorrect Authorization
Timeline
Published27 Aug 2026
Updated27 Sep 2026
First seen27 Aug 2026
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