{"id":"CVE-2026-12681","revision":"7b4f92504f7d45f7a44f92ff22bc121b","records":[{"revision":"7b4f92504f7d45f7a44f92ff22bc121b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-12681","aliases":[],"title":"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 all…","description":"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.","state":0,"publishedAt":"2026-06-24T00:49:13.5+00:00","modifiedAt":"2026-06-24T12:57:35.436+00:00","affected":[{"ecosystem":"Vendor product","name":"go-attestation","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Google\",\n                    \"product\": \"go-attestation\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"0.6.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.9,"severity":"HIGH"}],"references":["https://github.com/google/go-attestation/security/advisories/GHSA-9r4w-jg96-92mv","https://github.com/google/go-attestation/commit/b6e905e7ae52937f02b5ca494dd1c6a3ac7a1003","https://github.com/google/go-attestation/releases/tag/v0.6.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-12681","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-12681","identifiers":["CVE-2026-12681"]},"retained":false,"historicalAffected":[]}],"coverage":[]}