CVE-2026-47841 WebAuthn User Verification Bypass via Session Serialization
Attackers can bypass WebAuthn user verification in Spring Security applications using distributed session stores, potentially gaining unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47841?
CVE-2026-47841 is a high-severity authentication bypass vulnerability in Spring Security, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An application using Spring Security's WebAuthn support may be vulnerable to user verification bypass when using a distributed HTTP session store. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6 Spring Security 6.5.0 - 6.5.11 Spring Security 6.4.0 - 6.4.18
Weakness: CWE-863
Which versions are affected by CVE-2026-47841?
It affects 1 product.
Products include Vmware Spring Security.
How do I fix CVE-2026-47841?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-47841 being exploited?
There is no known exploitation of CVE-2026-47841 in the wild and no public exploit code.
Other vulnerabilities in Spring Security
- CVE-2014-3527 Authorization Bypass in Spring Security
- CVE-2026-59354 Spring Security OAuth2 Authorization Server: Insufficient validation of Dynamic Client Registration metadata
- CVE-2026-59270 Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN on all network interfaces
- CVE-2026-22732 Under Some Conditions Spring Security HTTP Headers Are not Written
- CVE-2023-34034 Access Control Bypass in Spring Security
Sources
Also known as CLEANSTART-2026-KL61134, CLEANSTART-2026-QU78029, ECHO-7166-efd5-6d52, GHSA-326h-rh66-6gp9.