CVE-2026-100836

MEDIUMCVSS 4.3

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.

Timeline

Published:September 27th, 2026 2:17 AM

Last modified:September 28th, 2026 4:17 PM

CVSS Scoring

CVSS v3: 4.3 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-129

References & Reports

Advisories, patches, and third-party reports

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

Source: NIST NVD · Data may lag official sources by up to one minute