CVE-2026-12681: Google Go-Attestation

High severity, CVSS 8.9. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Google go-attestation. parseEfiSignatureList() does not advance the buffer past vendor bytes before reading entries. For hashSHA256SigGUID lists, this allows attacker-controlled vendor header bytes to be appended to the trusted SHA256 hash list. A crafted TPM event log could inject arbitrary SHA256 hashes into the verifier's trusted measurement database, enabling a remote attestation verifier to accept a compromised boot state. This issue affects go-attestation: through 0.6.0.

Affected products

• Google Go-Attestation: up to and including 0.6.0

Published 2026-06-24. Last modified 2026-06-25.