CVE-2026-108334 Red Hat CVE debrief

Who should care

Defenders responsible for Gateway-level authentication and rate limiting configurations, as well as developers and administrators of HTTPRoutes, should assess exposure and verify proper input validation and sanitization.

Why it matters

CVE-2026-108334 is a HIGH-severity vulnerability in the Kuadrant operator's WASM shim that allows bypass of Gateway-level authentication and rate limiting. Defenders should prioritize verifying exposure, reviewing HTTPRoute match fields, and ensuring proper input validation and sanitization.

• Potential bypass of Gateway-level authentication and rate limiting
• Increased risk of unauthorized access to protected resources
• Need for verification of HTTPRoute match fields and input validation

Technical summary

The Kuadrant operator's internal WASM shim does not correctly escape values from HTTPRoute match fields, allowing users with permission to create or modify HTTPRoutes to bypass Gateway-level authentication and rate limiting. This issue arises from the shim's inability to properly handle crafted path, header, or query match values, potentially leading to unauthorized access to protected resources. Defenders should prioritize verifying exposure, reviewing HTTPRoute match fields, and ensuring proper input validation and sanitization.

Defensive priority

Defenders should prioritize verifying exposure of Gateway-level authentication and rate limiting configurations, reviewing HTTPRoute match fields for potential bypass attempts, and ensuring proper input validation and sanitization.

Recommended defensive actions

• Verify exposure of Gateway-level authentication and rate limiting configurations
• Review HTTPRoute match fields for potential bypass attempts
• Ensure proper input validation and sanitization
• 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
• 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions, exploitation, and remediation is limited. The Kuadrant operator's internal WASM shim does not correctly escape values from HTTPRoute match fields, allowing users with permission to create or modify HTTPRoutes to bypass Gateway-level authentication and rate limiting. Further review of HTTPRoute match fields and input validation is necessary.

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.