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CVE-2026-59313

CriticalPublished

Server Sent Event stream corruption in Spring MVC functional web framework

Published: Aug 27, 2026
Updated: Aug 28, 2026
Assigning CNA: vmware
Evidence observed: Sep 9, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 32.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Spring MVC applications using the functional web framework are vulnerable to stream corruption when using Server-Sent Events (SSE). 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

Sources

1day-archiveResearch
Technical deep-dives and root cause analyses of recently disclosed CVEs - reverse engineering patches, building proof-of-concepts, and documenting exploitation techniques in the 1-day window.

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