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CVE-2025-71426— Contrast before 1.4.1 Coordinator Impersonation via Unauthenticated Recovery

Quick assessment

Affected
edgelesssys contrast
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Contrast 是用于 Kubernetes 的机密计算运行时环境。在 1.4.1 版本之前，恢复阶段的协调器（Coordinator）不会验证恢复方提供的种子（seed）。攻击者因此可以部署一个恶意的协调器，其清单（manifest）能够通过验证，但其秘密种子由攻击者控制。如果网络流量被从合法协调器重定向到攻击者的协调器，工作负载所有者可能在以下情况下被冒充：当他们设置新的清单时，未将返回的根 CA 证书与现有证书进行比较（这是 Contrast CLI 的默认行为）；或在验证协调器时，未将根 CA 证书与可信

CVSS 7.1 · High EPSS 0.14% · P3
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I. Basic Information for CVE-2025-71426

Vulnerability Information
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Vulnerability Title
Contrast before 1.4.1 Coordinator Impersonation via Unauthenticated Recovery
Source: CVE Program / CVE List V5
Vulnerability Description
Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.4.1, a recovering Coordinator does not verify the seed supplied by the recovering party. An attacker can therefore stand up a rogue Coordinator whose manifest passes validation but whose secret seed is attacker-controlled. If network traffic is redirected from the legitimate Coordinator to the attacker's Coordinator, a workload owner can be impersonated when they either set a new manifest without comparing the returned root CA certificate against the existing one (the default behavior of the contrast CLI) or verify the Coordinator without comparing the root CA certificate against a trusted reference. Under these conditions the attacker can issue certificates that chain back to the rogue Coordinator's root CA and recover arbitrary workload secrets of workloads deployed after the attack. Secrets of the legitimate Coordinator (seed, workload secrets, CA), workload integrity, and certificates chaining to the mesh CA are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
edgelesssys contrast 0 ~ 1.4.1 -

II. Public POCs for CVE-2025-71426

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III. Intelligence Information for CVE-2025-71426

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Vendor Advisories for CVE-2025-71426 (1)

Other References for CVE-2025-71426 (1)

Same Patch Batch · edgelesssys · 2026-09-27 · 11 CVEs total

CVE-2026-100839 8.4 HIGH Contrast before 1.18.0 AML Injection Remote Code Execution
CVE-2026-100833 8.2 HIGH Contrast before 1.23.1 Image Substitution via Policy Generation
CVE-2026-100838 8.1 HIGH Contrast before 1.19.1 CopyFile Policy Symlink Subversion
CVE-2026-100835 7.4 HIGH Contrast before 1.16.0 Remote Attestation Relay Attack
CVE-2025-71425 7.3 HIGH Contrast before 1.8.1 Information Disclosure via Logging
CVE-2025-71423 7.3 HIGH Edgelesssys Contrast before 1.12.2 Workload Secrets Information Disclosure
CVE-2025-71422 5.7 MEDIUM Contrast before 1.12.1 Insecure LUKS2 Persistent Storage
CVE-2026-100836 4.3 MEDIUM Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer
CVE-2026-100837 3.7 LOW Edgeless Systems Contrast through 1.20.0 Credential Leak via Registry Suffix Matching
CVE-2025-71424 3.5 LOW Edgeless Systems Contrast before 1.9.1 Insecure Volume Mount

IV. Related Vulnerabilities

Same product: contrast
Same vendor: edgelesssys
Same weakness: CWE-285

V. Comments for CVE-2025-71426

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