CVE-2026-100839

Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.18.0, the guest kernel's ACPI/AML handling is vulnerable to an AML injection attack ("BadAML"). ACPI tables containing AML bytecode are passed from the untrusted host (QEMU) to the guest firmware (OVMF) and on to the Linux kernel, whose AML interpreter executes them. An attacker controlling the host — an assumed adversary in Contrast's threat model — can craft a table with malicious, Turing-complete AML bytecode that the guest kernel interprets with access to the full guest memory, including private pages, resulting in arbitrary code execution and disclosure or modification of confidential guest data. The issue affects the AMD SEV-SNP platforms Metal-QEMU-SNP and Metal-QEMU-SNP-GPU; Metal-QEMU-TDX is not affected because ACPI table contents are measured into RTMR 0 by OVMF on Intel TDX. Version v1.18.0 mitigates the attack by sandboxing the kernel AML interpreter so that it cannot read or write private memory pages. This weakness is not specific to Contrast but is generic to Confidential Computing setups that expose the ACPI interface to the host.

• CWE-94

• 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

Published

Sep 27, 2026

Last Modified

Sep 27, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-100833Contrast (edgelesssys/contrast) versions 1.14.0 before 1.23.…8.2
• CVE-2026-100834http4k's Digest authentication module (org.http4k:http4k-sec…5.9
• CVE-2026-100835Contrast before 1.16.0 is susceptible to remote attestation …7.4
• CVE-2026-100836Contrast through 1.20.0 contains a panic vulnerability in th…4.3
• CVE-2026-100837Contrast (Edgeless Systems) through 1.20.0 performs unanchor…3.7
• CVE-2026-100838Contrast is a confidential-computing runtime for Kubernetes.…8.1
• CVE-2026-100840MONAI through 1.6.0 contains a remote code execution vulnera…7.8
• CVE-2026-100841In MONAI 1.6.0, PersistentDataset (monai/data/dataset.py) ex…7.8
• CVE-2026-100842MONAI through 1.6.0 contains an eval injection vulnerability…7
• CVE-2026-100843MONAI versions before 1.6.0 contain a remote code execution …7.8
• CVE-2026-100844MONAI before 1.6.0 is vulnerable to OS command injection in …8.4
• CVE-2026-100845MONAI before 1.6.0 contains an unsafe deserialization vulner…7.8