CVE-2026-19201: Denial of Service via Unbounded Recursion in go-attestation Windows SIPA Parser
An uncontrolled recursion vulnerability in the Windows SIPA event log parser of Google go-attestation versions up to and including 0.6.1 allows an attacker to cause a denial of service (DoS). The (WinEvents).readELAMAggregation function recurses for every nested elamAggregation sub-event without enforcing a maximum recursion depth limit, while the size guard is bypassed on recursive execution paths. By submitting a crafted Windows event log containing deeply nested elamAggregation headers, an attacker can exhaust the goroutine call stack, triggering an unrecoverable fatal runtime error (stack overflow) that immediately crashes the verifier application.
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this denial of service?
Verifier applications using Google go-attestation version 0.6.1 or earlier that parse Windows SIPA event logs are exposed. The affected parsing path is the Windows ELAM aggregation event handling in (*WinEvents).readELAMAggregation.
What must an attacker provide to trigger the crash?
An attacker must submit a crafted Windows event log containing deeply nested elamAggregation headers. Each nested sub-event causes another recursive parser call, allowing the goroutine call stack to be exhausted.
What is the operational impact of successful exploitation?
The verifier application immediately crashes when Go encounters an unrecoverable stack-overflow fatal runtime error. The issue is a denial of service rather than an indicated confidentiality or integrity impact.
Which version addresses the issue?
The issue is fixed in Google go-attestation v0.6.2. Versions up to and including 0.6.1 are affected.