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Advisory record · GHSA-g9ww-x58f-9g6m

Contrast BadAML injection allows arbitrary code execution

CVSS 8.4 HighEPSS 0.0015 · 4th percentile

Published by the GitHub Advisory Database at 26 Mar 2026, 19:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/edgelesssys/contrastGo<1.18.01.18.0
Identifiers
GHSA-g9ww-x58f-9g6m · CVE-2026-100839 · GO-2026-4863
Weakness (CWE)
CWE-94
Tags
Published
26 Mar 2026
Updated
27 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Contrast versions before 1.18.0 are vulnerable to BadAML, an AML injection attack on the ACPI interface that affects the Metal-QEMU-SNP and Metal-QEMU-SNP-GPU platforms. An attacker with control of the host can craft malicious AML code in ACPI tables and execute it inside the confidential guest, gaining arbitrary code execution. Upgrade to Contrast 1.18.0 or later, which adds a sandbox that blocks AML access to private memory pages.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.4 High 4.0 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0015, the 4th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:13 UTC First seen by agentprime
  2. 31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.