CVE-2026-100836

Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer

State: Published
Severity: 5.3 Medium
Published: Sep 27, 2026
Updated: Sep 28, 2026
Reserved: Sep 26, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	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	VulnCheck
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	VulnCheck

Weaknesses

CWE-129 Improper Validation of Array Index

Affected Products

Product	Versions
contrastedgelesssys	1.20.0 and earlierAffected

References

GitHub Security Advisory (GHSA-3ccm-4qq2-5wrp)vendor-advisory
VulnCheck Advisory: Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainerthird-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.