CVE-2026-102460 Eclipse Foundation CVE debrief

Who should care

Defenders and developers using Eclipse Vert.x Web with ChainAuthHandler and scope-requiring authentication handlers should assess exposure and verify versions. They should prioritize verifying and updating affected Eclipse Vert.x versions to prevent scope bypass and review authentication handlers in the request pipeline.

Why it matters

Defenders should care about this vulnerability as it allows users with valid tokens but insufficient scopes to access protected resources, potentially leading to unauthorized access and impacting authentication and authorization mechanisms.

• Potential unauthorized access to resources protected by scope requirements
• Need to verify and update affected Eclipse Vert.x versions
• Possible impact on authentication and authorization mechanisms

Technical summary

The vulnerability exists in Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0]. A user with a valid token but insufficient scopes can access resources protected by scope requirements if authenticated by an earlier handler in the pipeline. The root cause is that postAuthentication() relies on internal state that is only set during the authenticate() phase, which is skipped entirely for pre-authenticated users. In any() mode, the absence of this state causes the method to fall through without delegating scope checks to any handler. In all() mode, scope checks are unconditionally skipped.

Defensive priority

Defenders should prioritize verifying and updating affected Eclipse Vert.x versions to prevent scope bypass.

Recommended defensive actions

• Verify and update affected Eclipse Vert.x versions
• Review and adjust authentication handlers in the request pipeline
• Monitor for potential scope bypass attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and references to additional information. The vulnerability exists in Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0]. Defenders should verify and update affected Eclipse Vert.x versions to prevent scope bypass.

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.