CVE-2026-62182: KubeEdge ConfigUpdateJob RCE Vulnerability

CVE-2026-62182 Overview

CVE-2026-62182 is an operating system command injection vulnerability [CWE-78] in KubeEdge, an open source system that extends native containerized application orchestration to edge hosts. The flaw resides in ConfigUpdateJob processing within edge/pkg/taskmanager/actions/configupdatejob.go. Authenticated user-controlled updateFields values are concatenated into a keadm config-update command and executed through a system shell. An authenticated user with permission to create or modify ConfigUpdateJob resources can inject shell metacharacters into the --set value. Affected releases span versions 1.21.0 through 1.21.1, 1.22.0 through 1.22.1, and 1.23.0. Fixed versions are 1.21.2, 1.22.2, and 1.23.1.

Critical Impact
Attackers with ConfigUpdateJob privileges can execute arbitrary commands on enrolled edge nodes with the privileges of the KubeEdge process handling the job.

Affected Products

KubeEdge versions 1.21.0 through 1.21.1
KubeEdge versions 1.22.0 through 1.22.1
KubeEdge version 1.23.0

Discovery Timeline

2026-09-21 - CVE-2026-62182 published to NVD
2026-09-24 - Last updated in NVD database

Technical Details for CVE-2026-62182

Vulnerability Analysis

The vulnerability exists in the task manager component responsible for pushing configuration updates to edge nodes. When a ConfigUpdateJob is processed, the controller builds the keadm config-update command line by concatenating attacker-influenced updateFields map entries directly into the --set argument. The full command string is then passed to a system shell for execution rather than to an exec syscall with argument arrays.

Because shell interpretation occurs, characters such as ;, &&, |, backticks, and $() retain their metasyntactic meaning. The result is arbitrary command execution on the target edge node under the identity of the KubeEdge process handling the job. In production deployments, this frequently means root or an equivalent service account with local privileges.

Root Cause

The root cause is unsafe command construction combined with shell invocation. The affected code path in configupdatejob.go treats updateFields values as trusted text and interpolates them into a single command string. There is no allowlist, escaping, or shell-metacharacter validation applied to user-supplied field values before execution.

Attack Vector

Exploitation requires an authenticated principal with permission to create or modify ConfigUpdateJob resources in the KubeEdge control plane. The attacker submits a job whose updateFields value contains shell metacharacters chained to arbitrary commands. When the task manager schedules the job to an enrolled edge node, the injected payload executes on that node.

// Patch excerpt: edge/pkg/taskmanager/actions/configupdatejob.go
 	"context"
 	"encoding/json"
 	"fmt"
+	"os/exec"
+	"sort"
 	"strings"
 
 	"github.com/go-logr/logr"
// Source: https://github.com/kubeedge/kubeedge/commit/14f65fc6207787f266cbcb0dceac7f09a81bab2b

The patch replaces shell-based execution with the os/exec package, which invokes the target binary directly and passes arguments as a slice, eliminating shell interpretation of updateFields content.

Detection Methods for CVE-2026-62182

Indicators of Compromise

Unexpected child processes of the KubeEdge or keadm process on edge nodes, particularly shell interpreters (sh, bash) spawning network utilities.
ConfigUpdateJob resources whose updateFields values contain shell metacharacters such as ;, |, &, backticks, or $(...).
Audit log entries showing creation or modification of ConfigUpdateJob resources by service accounts that do not normally push edge configuration changes.

Detection Strategies

Inspect Kubernetes audit logs for create and update verbs on the configupdatejobs resource, correlating actor identity against a known allowlist of edge operators.
Monitor process lineage on edge nodes for keadm config-update invocations that fork non-standard binaries.
Compare deployed KubeEdge versions against fixed releases 1.21.2, 1.22.2, and 1.23.1 using cluster inventory tooling.

Monitoring Recommendations

Enable Kubernetes audit logging at RequestResponse level for KubeEdge custom resources and ship events to a centralized data lake.
Alert on outbound network connections initiated by KubeEdge processes to destinations outside expected control-plane endpoints.
Track file writes under sensitive paths (/etc, /root, /var/lib/kubeedge) originating from keadm or its descendants.

How to Mitigate CVE-2026-62182

Immediate Actions Required

Upgrade KubeEdge to version 1.21.2, 1.22.2, or 1.23.1 depending on your current minor release track.
Restrict Kubernetes RBAC permissions on ConfigUpdateJob resources to a minimal set of trusted service accounts and human operators.
Review recent ConfigUpdateJob submissions for suspicious updateFields content that predates patching.

Patch Information

The fix is delivered in KubeEdge Release v1.21.2, KubeEdge Release v1.22.2, and KubeEdge Release v1.23.1. The upstream commits are 14f65fc, 6309a33, and ee78415, delivered through PR #7028, PR #7029, and PR #7030. Full advisory details are available in GHSA-m3c6-2p7h-cfr3.

Workarounds

Remove ConfigUpdateJob create and update permissions from all roles that do not require them until patched versions are deployed.
Apply admission policies (for example, Kyverno or OPA Gatekeeper) that reject ConfigUpdateJob objects containing shell metacharacters in updateFields.
Run KubeEdge components under the least-privileged system account feasible on edge nodes to constrain the blast radius of injected commands.

bash

# Example: block ConfigUpdateJobs containing shell metacharacters via Kyverno
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: block-configupdatejob-injection
spec:
  validationFailureAction: Enforce
  rules:
    - name: reject-shell-metachars
      match:
        any:
          - resources:
              kinds:
                - ConfigUpdateJob
      validate:
        message: "updateFields values must not contain shell metacharacters"
        pattern:
          spec:
            updateFields:
              =(*): "!*;*&!*|*!*`*!*$(*"