What is CVE-2026-47877?

CVE-2026-47877 is a high-severity vulnerability in Spring Security, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-08-27.

How severe is CVE-2026-47877?

High severity. CVSS v3 base score is 8.2 out of 10.

XSS in Spring Security

CVE-2026-47877

Spring Security Authorization Server's default consent page renders user-controlled values without HTML entity encoding. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Spring Security — versions 7.1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@vmware.com

Frequently asked questions

What is CVE-2026-47877?: CVE-2026-47877 is a high-severity vulnerability in Spring Security, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-08-27.
How severe is CVE-2026-47877?: High severity. CVSS v3 base score is 8.2 out of 10.