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CVE-2026-47885 Spring CVE debrief

CVE-2026-47885 PartEventHttpMessageReader Security Vulnerability in Spring WebFlux allows potential denial-of-service (DoS) attacks and data tampering due to improper size limits. Defenders should assess exposure and prioritize patching for Spring Framework versions 6.1.0 through 6.1.28, 6.2.0 through 6.2.19, and 7.0.0 through 7.0.8. This executive overview covers the affected product, vulnerability class, likely operational impact, and source-confidence limits, emphasizing the need for configuration reviews and mitigation strategies.

Vendor
Spring
Product
Spring Framework
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-27
Original CVE updated
2026-09-10
Advisory published
2026-08-27
Advisory updated
2026-09-10

Who should care

Defenders responsible for Spring Framework deployments, vulnerability management teams, and security operators should assess exposure and prioritize patching. They should review configurations, verify patch application, and monitor for potential exploitation attempts. This includes teams managing Spring-based applications, security teams responsible for vulnerability management, and operators handling system updates.

Why it matters

CVE-2026-47885 is a high-severity vulnerability in Spring Framework's PartEventHttpMessageReader. Defenders should prioritize patching and configuration reviews to mitigate potential DoS attacks and data tampering risks.

  • Potential denial-of-service (DoS) attacks
  • Data tampering or corruption due to improper size limits
  • Increased risk of successful exploitation due to default configurations
  • Verification of patch application and configuration updates

Technical summary

The PartEventHttpMessageReader in Spring WebFlux does not enforce the maxPartSize limit when maxInMemorySize is set to -1. This affects Spring Framework versions 6.1.0 through 6.1.28, 6.2.0 through 6.2.19, and 7.0.0 through 7.0.8. The vulnerability allows potential denial-of-service (DoS) attacks and data tampering or corruption due to improper size limits. Defenders should prioritize verifying and applying patches, reviewing and updating maxPartSize and maxInMemorySize configurations, and monitoring for potential exploitation attempts.

Defensive priority

Defenders should prioritize verifying and applying patches for Spring Framework versions 6.1.0 through 6.1.28, 6.2.0 through 6.2.19, and 7.0.0 through 7.0.8.

Recommended defensive actions

  • Verify and apply patches for affected Spring Framework versions
  • Review and update maxPartSize and maxInMemorySize configurations
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD entry provide details on the PartEventHttpMessageReader vulnerability in Spring WebFlux, which does not enforce the maxPartSize limit when maxInMemorySize is set to -1.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47885 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47885

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47885 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47885

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.