8.9

CVE-2026-12681: google go-attestation

CVSS: 8.9v4.0HighAwaiting analysis
AliasesUBUNTU-CVE-2026-12681DEBIAN-CVE-2026-12681CGA-2qvv-fc7p-jqp4
Published 24-06-2026Last modified 24-06-2026
Open JSON

Vulnerability summary

CVE-2026-12681 is a high (CVSS 8.9) vulnerability in google go-attestation. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.7% of scored vulnerabilities.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.9/10
010
High · v4.0 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-94VQ-67R2-GWVM

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.
  2. 24-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

8 scores · 7 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

+0.08 pp

From 0.19% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard12 products
  • tbot< 18.9.2-r2
  • teleport-17< 17.7.26-r1
  • teleport-17-operator< 17.7.26-r1
  • teleport-17-tbot< 17.7.26-r1
  • teleport-18< 18.9.2-r1
Wolfi2 products
  • teleport-18.6< 18.6.8-r30
  • teleport-18.6-operator< 18.6.8-r30
Debian1 product
  • golang-github-google-go-attestation< 0.6.1-1
Github.com/google1 product
  • go-attestation< 0.6.1 | All versions (No fix recorded)
Google1 product
Ubuntu1 product
  • golang-github-google-go-attestationAll versions (No fix recorded)

6 vendors · 18 products

References

11 links
Show all 11 references