---
title: "CVE-2026-100839: Contrast - Template Injection"
description: "Contrast confidential-computing runtime for Kubernetes < 1.18.0 contains an AML injection caused by untrusted ACPI tables from the host executed by the guest kernel's AML interpreter, letting host attackers execute arbitrary code and access confidential guest memory, exploit requires host control."
url: https://panop.io/threat-heartbeat/CVE-2026-100839/
---

# CVE-2026-100839 Contrast - Template Injection

Contrast confidential-computing runtime for Kubernetes < 1.18.0 contains an AML injection caused by untrusted ACPI tables from the host executed by the guest kernel's AML interpreter, letting host attackers execute arbitrary code and access confidential guest memory, exploit requires host control.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.15% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100839)

## Details

Type

Template Injection

Impact

Remote Code Execution, Information Disclosure, Data Tampering

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Published

27 September 2026

Updated

15 October 2026

Weakness

[CWE-94](https://cwe.mitre.org/data/definitions/94.html)

## Vendor fix

Update to version 1.18.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100839](https://nvd.nist.gov/vuln/detail/CVE-2026-100839)
- [https://github.com/edgelesssys/contrast/security/advisories/GHSA-g9ww-x58f-9g6m](https://github.com/edgelesssys/contrast/security/advisories/GHSA-g9ww-x58f-9g6m)
- [https://www.vulncheck.com/advisories/contrast-before-1.18.0-aml-injection-remote-code-execution](https://www.vulncheck.com/advisories/contrast-before-1.18.0-aml-injection-remote-code-execution)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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