High severity · published Sep 27, 2026
CVE-2026-100835
Contrast before 1.16.0 Remote Attestation Relay Attack
7.4
CVSS
0.3%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
contrast · edgelesssys
before 1.16.0 · source: vendor
Affected product
CO
contrast
edgelesssys
More from contrast
9.6
CVE-2026-100833
Contrast before 1.23.1 Image Substitution via Policy Generation
8.4
CVE-2026-100839
Contrast before 1.18.0 AML Injection Remote Code Execution
8.1
CVE-2026-100838
Contrast before 1.19.1 CopyFile Policy Symlink Subversion
7.8
CVE-2026-109358
Edgeless Systems Contrast 1.8.0 before 1.24.1 World-Writable Containerd Config Privilege Escalation
7.7
CVE-2026-109359
Contrast 1.8.0 before 1.24.1 Mesh CA Key Cross-Manifest Exposure via Peer Recovery