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CVE-2026-19201: Denial of Service via Unbounded Recursion in go-attestation Windows SIPA Parser

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-09 · updated 2026-09-24
• Weakness: CWE-674

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.

Affected products

• Google go-attestation: through 0.6.1

References

• https://github.com/google/go-attestation/pull/506
• https://github.com/google/go-attestation/releases/tag/v0.6.2
• https://github.com/google/go-attestation/security/advisories/GHSA-hcm6-rjfh-f25p

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