CVE-2026-31903 IGL-Technologies CVE debrief

Who should care

Operators and administrators of IGL-Technologies eParking.fi, especially teams managing OCPP server deployments, charger telemetry, authentication controls, and monitoring for connected charging infrastructure.

Technical summary

The advisory describes a network-reachable WebSocket application interface that does not limit authentication requests. CISA says this can enable denial-of-service conditions by suppressing or mis-routing legitimate charger telemetry, and can also support brute-force attempts to gain unauthorized access. The supplied mitigation notes indicate that updated OCPP servers now enforce stronger security profiles, device-level whitelisting, rate limiting, and automated monitoring; CISA also notes that encrypted eParking OCPP deployments and IGL-Technologies’ eTolppa protocol are not impacted.

Defensive priority

High

Recommended defensive actions

• Apply the vendor-updated eParking OCPP server protections referenced in the advisory.
• Enforce strong authentication and modern security profiles for any exposed WebSocket authentication path.
• Add rate limiting or throttling for authentication requests to reduce brute-force and DoS risk.
• Restrict connections to known charging units using device-level whitelisting.
• Monitor for abnormal network and authentication activity and alert on spikes or repeated failures.
• Confirm whether your deployment uses the impacted eParking OCPP server path or one of the stated non-impacted encrypted/eTolppa deployments.
• Contact IGL-Technologies security at [email protected] if you need clarification on exposure or remediation.

Evidence notes

All substantive claims in this debrief are taken from the supplied CISA CSAF advisory for ICSA-26-078-07 / CVE-2026-31903 and its listed remediation notes. The source states that the WebSocket API lacks authentication request limits and that the resulting risks are denial of service via telemetry disruption and brute-force access attempts. Timing context uses the supplied advisory/CVE publication date of 2026-03-19; no earlier public issue date is asserted here.

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.