CVE-2026-102475 Eclipse Foundation CVE debrief

Who should care

Defenders responsible for Eclipse Vert.x deployments, especially those using the affected versions, should assess exposure and prioritize patching or mitigation. This includes operators, platform administrators, vulnerability managers, and security teams. They should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2026-102475 is a high-severity vulnerability in Eclipse Vert.x that can be used to force a server to indefinitely allocate heap. Defenders should prioritize patching or mitigating this vulnerability, especially in environments using the affected versions.

• Potential for indefinite heap allocation
• Possible denial-of-service (DoS) conditions
• Need for patching or mitigation to prevent exploitation

Technical summary

The HTTP proxy in Eclipse Vert.x provides a body transformer interceptor that relies on a max buffered bytes limit to ensure a bounded buffer for each request. This can be used to force a server to indefinitely allocate heap. This vulnerability requires to use an intercepting body transformer. The impacted component is io.vertx:vertx-http-proxy. This vulnerability affects Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0]. Defenders should prioritize patching or mitigating this vulnerability.

Defensive priority

Defenders should prioritize patching or mitigating this vulnerability, especially in environments using the affected versions of Eclipse Vert.x.

Recommended defensive actions

• Patch or upgrade to a non-vulnerable version of Eclipse Vert.x
• Implement compensating controls to limit the impact of the vulnerability
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD vulnerability detail provide information on the affected versions and the nature of the vulnerability. Defenders should verify the affected scope and vendor guidance. Limited source detail is provided, so explicit evidence limits and defensive verification tasks are necessary. The impacted component is io.vertx:vertx-http-proxy. This vulnerability requires using an intercepting body transformer. CVE-2026-102475 is a high-severity vulnerability in Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0,

Sources and 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.