CVE-2026-100836
5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| edgelesssys | contrast | 0 <= 1.20.0 | affected |
Weaknesses
- CWE-129: Improper Validation of Array Index
References
- 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
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