Bug 2524835 (CVE-2026-47891)

Summary: CVE-2026-47891 org.springframework/spring-webflux: org.springframework/spring-web: Spring WebFlux: Denial of Service due to maxInMemorySize bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aschwart, aszczucz, boliveir, drichtar, fmongiar, gmalinko, gtanzill, janstey, jbuscemi, jnethert, mposolda, pdelbell, pjindal, rhel-process-autobot, rmartinc, rstepani, sdawley, ssilvert, sthorger, vmuzikar, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Spring WebFlux applications that utilize the Aalto XML processor to parse XML input. A remote attacker could exploit this vulnerability by sending specially crafted XML, causing the application to bypass the maxInMemorySize limit. This can lead to excessive memory consumption, potentially resulting in a denial of service (DoS) condition for the application.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-08-27 06:21:20 UTC 
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