{"id":"CVE-2026-12681","aliases":["GHSA-9r4w-jg96-92mv","GO-2026-5298"],"url":"https://o3.security/vulnerability/CVE-2026-12681","summary":"Go-Attestation: Hash injection into trusted measurement list via unskipped SignatureHeaderSize vendor bytes in parseEfiSignatureList()","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.","published":"2026-06-24T00:49:13.500Z","modified":"2026-08-12T03:51:34.504886817Z","cvss":null,"epss":{"score":0.00191,"percentile":0.08785,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/google/go-attestation","fixedVersion":"0.6.1"}],"fix":{"url":"https://github.com/google/go-attestation/commit/b6e905e7ae52937f02b5ca494dd1c6a3ac7a1003","label":"google/go-attestation@b6e905e"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:34.504886817Z"}}