CVE-2026-19201 Denial of Service via Unbounded Recursion in go-attestation Windows SIPA Parser
An attacker can crash the verifier application by submitting a crafted Windows event log with deeply nested headers, causing a stack overflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-19201?
CVE-2026-19201 is a medium-severity denial of service vulnerability in Google go-attestation, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-674
Which versions are affected by CVE-2026-19201?
It affects 1 product.
Products include Google Go-Attestation.
How do I fix CVE-2026-19201?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-19201 being exploited?
There is no known exploitation of CVE-2026-19201 in the wild and no public exploit code.
Other vulnerabilities in Google go-attestation
Sources
Also known as DEBIAN-CVE-2026-19201, GHSA-7rqw-p8mv-672c, GHSA-hcm6-rjfh-f25p, UBUNTU-CVE-2026-19201.