Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer
Published Sep 27, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.15%
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.
Affected products
-
- Version 0StatusaffectedConstraints<=1.20.0
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Edgelesssys | Contrast | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
github.com/edgelesssys/contrast
Go
Introduced 0 Fixed 1.21.0
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/edgelesssys/contrast | 0 | 1.21.0 |
Remediation
No remediation recorded yet.
Metrics
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (2)
- https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp exploitvendor-advisory
- https://www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-denial-of-service-via-ciphertextcontainer third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp | exploitvendor-advisory | |
| https://www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-denial-of-service-via-ciphertextcontainer | third-party-advisory |
Change history (0)
No recorded changes yet.