CVE-2026-47841

WebAuthn User Verification Bypass via Session Serialization

HIGH

7.4

CVSS Score

Published: August 26, 2026 at 05:08 PM UTC

Updated: September 4, 2026 at 07:56 PM UTC

2 products affected across 2 vendorsSpring SecuritySpring Security

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Severity

HIGH7.4

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring Security · VMware

95%

6.4.0 ≤ v < 6.4.196.5.0 ≤ v < 6.5.127.0.0 ≤ v < 7.0.6.17.1.0 ≤ v < 7.1.0.1

Affected range stops below 6.4.19, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.5.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.6.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.1.0.1, so it looks safe — our inference, not a vendor statement

Spring Security · Spring

60%

6.4.0 ≤ v ≤ 6.4.186.5.0 ≤ v ≤ 6.5.117.0.0 ≤ v ≤ 7.0.66.4.0 6.5.0 7.0.0 7.1.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://spring.io/security/cve-2026-47841

References (1)

Vendor Advisory

Source: cverecord

https://spring.io/security/cve-2026-47841

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.4HIGHvmware

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-863

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