{"id":"CVE-2026-12681","details":"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.","aliases":["GHSA-9r4w-jg96-92mv","GO-2026-5298"],"modified":"2026-07-15T01:49:07.808948545Z","published":"2026-06-24T00:49:13.500Z","database_specific":{"cna_assigner":"Google","cwe_ids":["CWE-1285"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12681.json"},"references":[{"type":"WEB","url":"https://github.com/google/go-attestation/releases/tag/v0.6.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12681.json"},{"type":"ADVISORY","url":"https://github.com/google/go-attestation/security/advisories/GHSA-9r4w-jg96-92mv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12681"},{"type":"FIX","url":"https://github.com/google/go-attestation/commit/b6e905e7ae52937f02b5ca494dd1c6a3ac7a1003"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/google/go-attestation","events":[{"introduced":"0"},{"fixed":"de04cbed9b9338f836a2091775e53080dcd5d870"},{"fixed":"b6e905e7ae52937f02b5ca494dd1c6a3ac7a1003"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.6.0"}]}}],"versions":["v0.6.0","v0.5.1","v0.5.0","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.2","v0.3.1","v0.3.0","v0.2.2","v0.2.1","v0.2.0","v0.1.3","v0.1.2","v0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12681.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N"}]}