# CVE-2026-109359: Contrast improper verification in Coordinator peer recovery

Source: https://junglewise.ai/threats/cve-2026-109359-contrast-1-8-0-before-1-24-1-contains-an-improper-verification  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109359 · Severity: high · CVSS 7.7 · Published 2026-10-12

Contrast is a confidential computing platform that manages workload mesh certificates and security policies. A vulnerability in its peer recovery mechanism allows attackers with manifest write access to replay outdated security configurations, causing the system to issue certificates for workloads that should no longer be trusted. In the worst case, attackers who also possess the secret seed can compromise the Mesh CA key itself, breaking all mesh security.

Technologies: [Edgeless Systems Contrast](https://junglewise.ai/threats/technologies/contrast). Vendors: [Edgeless Systems](https://junglewise.ai/threats/vendors/edgeless-systems).

## Quick answers

**Is CVE-2026-109359 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109359 being exploited in the wild.

**How severe is CVE-2026-109359?** High severity, with a CVSS score of 7.7, published 12 October 2026.

**Which products and versions are affected?** Edgeless Systems Contrast 1.8.0 to 1.24.0.

**Is there a fix for CVE-2026-109359?** Yes: fixed in 1.24.1. Until then: Restrict write access to the Coordinator's manifest history to limit who can trigger the attack, and separate custody of the secret seed from Kubernetes administrative access to prevent single-actor compromise of the Mesh CA key. Use contrast verify to detect mismatched manifest states.</anigation>
<parameter name="confidence">0.95 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-109359 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-109359?** Check whether you run Edgeless Systems Contrast at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.24.1

Restrict write access to the Coordinator's manifest history to limit who can trigger the attack, and separate custody of the secret seed from Kubernetes administrative access to prevent single-actor compromise of the Mesh CA key. Use contrast verify to detect mismatched manifest states.</anigation>
<parameter name="confidence">0.95

## Technical details

The Coordinator peer recovery process fails to verify that the peer serves the same manifest generation, allowing replay of superseded history heads via CWE-345 (insufficient verification). Attackers with write access to manifest history can trigger adoption of withdrawn manifests with current Mesh CA keys, enabling certificate issuance for revoked workloads. Attackers additionally holding the secret seed can forge arbitrary manifests and designate attacker-controlled Coordinators to extract the CA key itself.

## Affected products

- Edgeless Systems Contrast 1.8.0 to 1.24.0

## Timeline

- 2026-09-24: disclosed
- 2026-10-12: advisory

## References

- [https://github.com/edgelesssys/contrast/security/advisories/GHSA-rxcv-p3px-m3c3](https://github.com/edgelesssys/contrast/security/advisories/GHSA-rxcv-p3px-m3c3)
- [https://www.vulncheck.com/advisories/contrast-1.8.0-before-1.24.1-mesh-ca-key-cross-manifest-exposure-via-peer-recovery](https://www.vulncheck.com/advisories/contrast-1.8.0-before-1.24.1-mesh-ca-key-cross-manifest-exposure-via-peer-recovery)

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