Remote Attestation Vulnerability in Contrast by Edgeless Systems
CVE-2026-100835

9.1CRITICAL

Key Information:

Vendor

Edgelesssys

Status
Contrast
Vendor
CVE Published:
27 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-100835?

The Contrast software by Edgeless Systems prior to version 1.16.0 is vulnerable to remote attestation relay attacks. This occurs when an attacker can intercept network traffic and manipulate attestation reports. Contrast's system accepted any attestation report that validated correctly, irrespective of the source hardware. This flaw allows an attacker, with access to a compromised Trusted Execution Environment (TEE), to relay forged reports, thereby impersonating legitimate components and bypassing essential identity verification in Contrast's secure TLS implementation.

Affected Version(s)

contrast 0 < 1.16.0

contrast 1.16.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-100835
Created by murrez

References

https://github.com/edgelesssys/contrast/security/advisori...
vendor-advisory
https://www.vulncheck.com/advisories/contrast-before-1.16...
third-party-advisory

CVSS V4

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

muhammad-usama-sardar
.