What is CVE-2026-47891?

CVE-2026-47891 is a critical-severity vulnerability in Spring Framework, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 9.8/10. Published 2026-08-27.

How severe is CVE-2026-47891?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Resource exhaustion in Spring Framework

CVE-2026-47891

A Spring WebFlux application that relies on the Aalto XML processor to parse XML input does not correctly enforce the maxInMemorySize limit. 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 5.2.25.RELEASE and earlier

EPSS: 0.001 (3.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Spring Framework

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security@vmware.com

Frequently asked questions

What is CVE-2026-47891?: CVE-2026-47891 is a critical-severity vulnerability in Spring Framework, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 9.8/10. Published 2026-08-27.
How severe is CVE-2026-47891?: Critical severity. CVSS v3 base score is 9.8 out of 10.