Vulnerability · Published Jun 24, 2026 · Assigned by Google
CVE-2026-12681
High 8.9
In plain English
A high-severity security flaw in go-attestation from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | golang-github-google-go-attestation | 0.6.1-1 | DEBIAN-CVE-2026-12681 |
| Go | github.com/google/go-attestation | 0.6.1 | GHSA-9r4w-jg96-92mv |
| Go | github.com/google/go-attestation | no fix listed | GO-2026-5298 |
| Ubuntu:26.04:LTS | golang-github-google-go-attestation | no fix listed | UBUNTU-CVE-2026-12681 |
| Ubuntu:26.10 | golang-github-google-go-attestation | no fix listed | UBUNTU-CVE-2026-12681 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| go-attestation | 0 – through 0.6.0 |
Weakness: CWE-1285 · 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