---
cve: "CVE-2026-12681"
severity: "HIGH"
cvss: 8.9
epss: "19%"
vendor: "Google"
kev: false
exploited: false
published: "2026-06-24 02:16:28"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T02:47:18+02:00"
---

# CVE-2026-12681

> 8.9 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- de04cbed9b9338f836a2091775e53080dcd5d870 (Commit)
- b6e905e7ae52937f02b5ca494dd1c6a3ac7a1003 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-12681) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_