Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck
CVE-2026-100835Contrast before 1.16.0 Remote Attestation Relay Attack
High 7.4
In plain English
A high-severity improper certificate validation in contrast from edgelesssys. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
Contrast before 1.16.0 is susceptible to remote attestation relay attacks. Contrast accepted any TEE attestation report that verified correctly and contained the expected firmware patch levels and software measurements, regardless of which machine produced it, so attestation was not bound to specific, physically trusted hardware. An attacker who can both intercept network traffic between the CLI and the Coordinator (or between the Coordinator and an attested component) and forge reports or extract secrets from any single TEE machine under their physical control can relay such a report to impersonate a Contrast Coordinator or a Contrast workload, defeating identity verification in Contrast's attested TLS (aTLS).
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| edgelesssys | contrast | 0 – before 1.16.0 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- GitHub Security Advisory (GHSA-hjgc-jc5v-fw7h) vendor-advisory
- VulnCheck Advisory: Contrast before 1.16.0 Remote Attestation Relay Attack third-party-advisory