What’s Vulnerable › Vulnerabilities

CVE-2026-100835: Contrast before 1.16.0 Remote Attestation Relay Attack

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-27 · updated 2026-09-30
• Weakness: CWE-295

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

• edgelesssys contrast: before 1.16.0 — fixed in 1.16.0

How to fix

Upgrade to a fixed version: edgelesssys contrast 1.16.0. Check the vendor advisory for mitigations.

References

• https://github.com/edgelesssys/contrast/security/advisories/GHSA-hjgc-jc5v-fw7h
• https://www.vulncheck.com/advisories/contrast-before-1.16.0-remote-attestation-relay-attack

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