AIKIDO-2026-189579
spring-webmvc is vulnerable to Improper Neutralization of Special Elements
26
Low Risk
This Affects:
spring-webmvcTL;DR
spring-webmvc and spring-webflux can corrupt a Server-Sent Event stream when rendering view fragments. If an attacker can influence data streamed to other users, they can inject SSE framing and present malicious content. This requires SSE fragment rendering plus control over another user's stream payload. The patch encodes fragment output so it cannot break the event stream.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you send view fragments to other users over Server-Sent Events.
Background info
spring-webmvc is vulnerable to Improper Neutralization of Special Elements in versions 6.2.0 - 7.0.8.
How to fix this
Upgrade the org.springframework:spring-webmvc and/or the org.springframework:spring-webflux library to the patch version.
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