CVE-2026-47891

Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder

State: Published
Severity: 9.8 Critical
Published: Aug 27, 2026
Updated: Aug 27, 2026
Reserved: May 20, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
Spring FrameworkSpring	7.0.0 through 7.0.8Affected 6.2.0 through 6.2.19Affected 6.1.0 through 6.1.28Affected 6.0.0 through 6.0.30Affected 5.3.0 through 5.3.49Affected 5.2.25.RELEASE and earlierAffected

References

https://spring.io/security/cve-2026-47891

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