Medium severity4.3NVD Advisory· Published Sep 27, 2026

CVE-2026-100836

Description

Contrast through 1.20.0 contains a panic vulnerability in the transit-engine endpoint's ciphertextContainer.UnmarshalJSON function that fails to validate decoded ciphertext length before slicing. An authenticated workload with a valid mesh certificate can trigger a runtime panic by submitting a short base64-encoded ciphertext, causing log spam and request failures without crashing the process.

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Affected products

Edgelesssys/contrastllm-create
Range: <=1.20.0

Patches

Vulnerability mechanics

References

github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrpnvd
www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-denial-of-service-via-ciphertextcontainernvd

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