Improper input validation in Google go-attestation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| go-attestation | up to 0.6.0 | — | No fix listed | CNA | |
| — | github.com/google/go-attestation (Go) | before 0.6.1 | 0.6.1 | Patch available | GHSA-9r4w-jg96-92mv |
- go-attestation VendorGoogle Affected up to 0.6.0 Fixed in — No fix listed CNA
- github.com/google/go-attestation (Go) Vendor— Affected before 0.6.1 Fixed in 0.6.1 Patch available GHSA-9r4w-jg96-92mv
Remediation
- Fix · GHSA-9r4w-jg96-92mv github.com/google/go-attestation (Go) Fixed in 0.6.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12681
- 2026-10-03 Alias added: GHSA-9r4w-jg96-92mv
References
Other 5
- 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
- https://github.com/google/go-attestation/pull/502
- https://github.com/google/go-attestation
More Google vulnerabilities
- TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
- TI-2024-07390 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2024-04898 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2024-04600 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2024-04346 Use after free in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6
Sources
- CVE-2026-12681 · CVE Program
- CVE-2026-12681 · NVD
- FIRST EPSS
- GHSA-9r4w-jg96-92mv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences