Envoy Gateway: OCI layer extraction allocates make([]byte, h.Size) from untrusted tar header
Summary
| CVE | CVE-2026-53717 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-14 20:16:45 UTC |
| Updated | 2026-09-15 20:17:18 UTC |
| Description | Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, internal/wasm/imagefetcher.go follows tenant-controlled EnvoyExtensionPolicy spec.wasm[].code.image.url values to Docker or OCI Wasm layers, and extractWasmPluginBinary uses the untrusted tar-header h.Size value to allocate memory before validating the entry name or declared size. A small PAX or GNU tar header can therefore claim a multi-terabyte entry even though the surrounding LimitReader restricts only the bytes read from the stream, and no registry allowlist prevents a permitted tenant from selecting an attacker-controlled registry that the controller can reach. The allocation is attempted for every tar entry and can cause an unrecoverable Go runtime out-of-memory failure; because the custom resource persists, reconciliation repeatedly crash-loops the shared controller and causes a single-request, non-volumetric, cluster-wide control-plane denial of service. This issue is fixed in versions 1.7.4 and 1.8.1. |
Risk And Classification
Primary CVSS: v3.1 6.5 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.007150000 probability, percentile 0.518360000 (date 2026-09-15)
Problem Types: CWE-789 | CWE-789 CWE-789: Memory Allocation with Excessive Size Value
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Envoyproxy | Gateway | affected < 1.7.4 | Not specified |
| CNA | Envoyproxy | Gateway | affected >= 1.8.0-rc.0, < 1.8.1 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/envoyproxy/gateway/releases/tag/v1.8.1 | [email protected] | github.com | |
| github.com/envoyproxy/gateway/pull/9173 | [email protected] | github.com | |
| github.com/envoyproxy/gateway/pull/9172 | [email protected] | github.com | |
| github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf2... | [email protected] | github.com | |
| github.com/envoyproxy/gateway/releases/tag/v1.7.4 | [email protected] | github.com | |
| github.com/envoyproxy/gateway/security/advisories/GHSA-h7pq-86h8-rp5x | [email protected] | github.com | |
| github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb015... | [email protected] | github.com | |
| github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c5095289203... | [email protected] | github.com | |
| github.com/envoyproxy/gateway/pull/9171 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.