CVE-2026-53715: Envoy Gateway Wasm Cache ServeHTTP Reads MappingPath2Cache Vulnerability

MODERATE
Advisory Identifier: GHSA-8fv2-88gg-hm7q
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CVSS 5.3
CWE-362
Published
Advisory Summary

CVE-2026-53715 is a MODERATE (CVSS 5.3) wasm cache servehttp reads mappingpath2cache vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Envoy Gateway libraries in the Go ecosystem. The issue involves wasm cache servehttp reads mappingpath2cache without lock. Remediation is available by upgrading affected packages to version 1.8.1, 1.7.4.

CVE-2026-53715 at a Glance

CVE Identifier CVE-2026-53715
GHSA Identifier GHSA-8fv2-88gg-hm7q
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Envoy Gateway
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-53715

To remediate this vulnerability, upgrade all affected Envoy Gateway dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/envoyproxy/gateway fixed: 1.8.1 
Upgrade github.com/envoyproxy/gateway to 1.8.1
github.com/envoyproxy/gateway fixed: 1.7.4 
Upgrade github.com/envoyproxy/gateway to 1.7.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/envoyproxy/gateway

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-53715, inspect your project dependencies for Envoy Gateway:

inspect dependencies for github.com/envoyproxy/gateway

Analyze the terminal output to locate any version of Envoy Gateway in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.8.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. In Envoy Gateway, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Vulnerability report without repro case. Repro case may be added later after harness is complete. **Preconditions (4):** - Pod-network reachability to :18002 (no auth) - Tenant can create EnvoyExtensionPolicy (baseline) - Attacker pod floods GET while churning EnvoyExtensionPolicy with distinct Wasm URLs - Read at :153 must overlap a write at :201/:209 (probabilistic, attacker controls both rates) **Description:** httpserver.go:153 reads s.mappingPath2Cache with no lock while httpserver.go:201/209 write it under s.Lock(); the struct uses a plain map. Writer is tenant-reachable via EnvoyExtensionPolicy translation, reader is pod-network-reachable on :18002 with per-request goroutines. Go's concurrent map read+write detection calls runtime.throw, which net/http's per-conn recover cannot catch, so the controller process exits — cross-tenant control-plane DoS. Capped at MEDIUM: DoS-only, k8s restarts pod, timing-dependent trigger.

CVE-2026-53715 Affected Envoy Gateway Versions

2 component(s)
Fixed Versions:
1.8.11.7.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/envoyproxy/gateway
golang/github.com/envoyproxy/gateway
Go
≥ 1.8.0-rc.0
< 1.8.1
1.8.1
github.com/envoyproxy/gateway
golang/github.com/envoyproxy/gateway
Go
< 1.7.4
1.7.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/envoyproxy/gateway/security/advisories/GHSA-8fv2-88gg-hm7q
Envoy Gateway Source Repository REPOSITORY
https://github.com/envoyproxy/gateway

Frequently Asked Questions

What is CVE-2026-53715?
CVE-2026-53715 is a security vulnerability in Envoy Gateway involving Wasm cache ServeHTTP reads mappingPath2Cache without lock under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Envoy Gateway versions are affected?
Affected versions include releases prior to 1.8.1, 1.7.4 across affected packages: github.com/envoyproxy/gateway.
What version fixes CVE-2026-53715?
Upgrading to 1.8.1, 1.7.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/envoyproxy/gateway affected?
Yes, github.com/envoyproxy/gateway is affected in releases prior to 1.8.1, 1.7.4. Upgrade your dependency to 1.8.1, 1.7.4 or later.
What is the CVSS score of CVE-2026-53715?
CVE-2026-53715 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-53715?
CVE-2026-53715 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check Go dependencies for CVE-2026-53715?
Run the dependency tree command: 'inspect dependencies for github.com/envoyproxy/gateway'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8fv2-88gg-hm7q",
  "modified" : "2026-07-16T19:21:15Z",
  "published" : "2026-07-16T19:21:15Z",
  "aliases" : [ "CVE-2026-53715" ],
  "summary" : "Envoy Gateway: Wasm cache ServeHTTP reads mappingPath2Cache without lock",
  "details" : "Vulnerability report without repro case. Repro case may be added later after harness is complete.\n\n**Preconditions (4):**\n- Pod-network reachability to :18002 (no auth)\n- Tenant can create EnvoyExtensionPolicy (baseline)\n- Attacker pod floods GET while churning EnvoyExtensionPolicy with distinct Wasm URLs\n- Read at :153 must overlap a write at :201/:209 (probabilistic, attacker controls both rates)\n\n**Description:**\n\nhttpserver.go:153 reads s.mappingPath2Cache with no lock while httpserver.go:201/209 write it under s.Lock(); the struct uses a plain map. Writer is tenant-reachable via EnvoyExtensionPolicy translation, reader is pod-network-reachable on :18002 with per-request goroutines. Go's concurrent map read+write detection calls runtime.throw, which net/http's per-conn recover cannot catch, so the controller process exits — cross-tenant control-plane DoS. Capped at MEDIUM: DoS-only, k8s restarts pod, timing-dependent trigger.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/envoyproxy/gateway"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.8.0-rc.0"
      }, {
        "fixed" : "1.8.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/envoyproxy/gateway"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.7.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/envoyproxy/gateway/security/advisories/GHSA-8fv2-88gg-hm7q"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/envoyproxy/gateway"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-16T19:21:15Z",
    "nvd_published_at" : null
  }
}