🔍 VULNERABILITY EXPOSURE ASSESSMENT
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Executive Summary
KubeEdge CloudCore ≤ 1.23.1 allows unauthenticated node task status reports on its HTTPS endpoint (port 10002), enabling attackers to falsify upgrade job outcomes and halt further upgrade scheduling. All organizations deploying KubeEdge in edge‑orchestrated environments are exposed to potential upgrade pipeline disruption and loss of compliance posture. Immediate decision required: approve remediation actions (patch or mitigation) and activate incident response to prevent malicious status manipulation.
Verified Facts
- KubeEdge CloudCore through version 1.23.1 accepts node task status reports on its HTTPS server without authentication verification — NVD article.
- Attackers can reach CloudCore on port 10002 to mark upgrade jobs as succeeded or failed, deceiving the control plane about node upgrade status and blocking further upgrade scheduling — NVD article.
- The vulnerability is assigned CVSS 8.2 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L) and maps to CWE‑306 — NVD article.
Threat Classification
Unauthenticated API manipulation affecting cloud‑edge orchestration platforms; primary sectors are telecommunications, manufacturing, and any enterprise leveraging KubeEdge for edge workloads; global geographic scope due to worldwide KubeEdge deployments; exploitation status currently theoretical with no public evidence of active use (MEDIUM CONFIDENCE); attacker motivation inferred as disruption of upgrade processes to create stale, vulnerable edge nodes (MEDIUM CONFIDENCE).
Threat Severity Assessment
- Exploitability: Network‑reachable, no authentication required (HIGH CONFIDENCE).
- Impact: Integrity of upgrade status can be falsified, leading to halted upgrades and potential security gaps (HIGH CONFIDENCE).
- Scope: All deployments of KubeEdge ≤ 1.23.1 are vulnerable (MEDIUM CONFIDENCE).
- Prevalence: KubeEdge is widely adopted for edge computing (MEDIUM CONFIDENCE).
Business Impact
Operational disruption: falsified upgrade status can stall critical security patch rollout, leaving edge nodes exposed to known vulnerabilities and increasing breach likelihood. Regulatory liability: failure to apply mandated security updates may breach GDPR, NIS2, or DORA obligations, exposing the organization to enforcement fines ranging from €10 million to 2 % of global turnover (applicable under those regimes). Financial exposure: high, due to potential incident response costs, remediation, and downtime of edge services. Reputational damage: customers may lose confidence in the organization’s ability to maintain secure edge infrastructure, leading to churn and negative press.
Technical Analysis
- Attack vector: Network (TCP 10002) HTTPS request to CloudCore endpoint.
- Exploitation chain: Attacker sends crafted node task status report → CloudCore records status as succeeded/failed → Control plane believes upgrade completed → Scheduler blocks further upgrades.
- Affected component: CloudCore HTTPS server handling node status reports.
- Vulnerable versions: KubeEdge ≤ 1.23.1.
- Root cause: Missing authentication verification on status‑report endpoint (CWE‑306).
- CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.
CVE Analysis
- CVE‑2026‑82473 — KubeEdge CloudCore ≤ 1.23.1 — CWE‑306 (Missing Authentication) — Network (AV:N) — No authentication required (PR:N) — Patch status not disclosed in source article.
MITRE ATT&CK Mapping
- Initial Access → T1190: Exploit Public-Facing Application — attacker leverages unauthenticated HTTPS endpoint on port 10002 to submit forged status reports.
IOC Intelligence
No public IOCs confirmed at time of publication.
Behavioral IOC categories for detection:
- Unauthenticated HTTP POST to the CloudCore status‑report endpoint (e.g., URI containing “/node/status”).
- Requests originating from IP addresses not associated with registered edge nodes.
- Payloads indicating upgrade job IDs marked as “succeeded” or “failed” without a preceding upgrade command in control‑plane logs.
- Repeated status‑report submissions within short intervals (≤ 30 seconds) from the same source.
Detection Engineering Guidance
- Log source: CloudCore access logs – monitor HTTP method, URI, source IP, and TLS client certificate fields.
- Log source: Kubernetes audit logs – correlate “create” or “update” events on UpgradeJob resources with subsequent status‑report entries.
- Log source: Network flow telemetry (e.g., Zeek, NetFlow) – filter traffic to destination port 10002 with TLS handshake but no client certificate.
- Detection logic: Flag any HTTPS POST to “/node/status” where source IP is absent from the known node inventory and the payload contains “status=Succeeded” or “status=Failed”.
- Rationale: Directly matches the unauthenticated status‑report abuse described in the CVE.
Sigma Rules
title: KubeEdge CloudCore Unauthenticated Upgrade Status Report
id: 3f9a2c1e-5b4d-4f9a-8c2e-1d7f6a9b0c3d
status: stable
description: Detects unauthenticated HTTP POST requests to the CloudCore node status endpoint used to falsify upgrade job outcomes.
author: CYBERDUDEBIVASH Sentinel APEX
logsource:
product: kubeedge
service: cloudcore
detection:
selection:
network.destination.port: 10002
http.request.method: POST
http.request.uri|contains: "/node/status"
http.request.body|contains|all:
- "status=Succeeded"
- "status=Failed"
condition: selection
falsepositives:
- Legitimate node agents with proper authentication (should be filtered by auth check)
level: high
tags:
- attack.t1190
Threat Hunting Queries
- Hypothesis: Unauthorized sources are submitting node status reports. Query: `index=cloudcore_logs sourcetype=access_log destination_port=10002 http_method=POST uri="*/node/status" NOT src_ip IN (list_of_known_node_ips)` — CloudCore access logs.
- Hypothesis: Upgrade jobs are marked completed without corresponding upgrade commands. Query: `index=kubernetes_audit event_type="update" object_ref.kind="UpgradeJob" | stats count by object_ref.name, user.username` and compare with CloudCore status logs for same job IDs.
- Hypothesis: Repeated status‑report submissions from a single IP. Query: `index=cloudcore_logs uri="*/node/status" | timechart span=1m count by src_ip` — Network telemetry.
- Hypothesis: TLS handshakes on port 10002 lacking client certificates. Query: `index=zeek_ssl ssl.destination_port=10002 NOT ssl.client_certificate` — Zeek SSL logs.
- Hypothesis: Sudden drop in scheduled upgrade jobs after status manipulation. Query: `index=kubernetes_audit event_type="create" object_ref.kind="UpgradeJob" | timechart span=5m count` and correlate with status‑report spikes.
SOC Analyst Playbook
- P0 – Immediate (0‑1
Basis: c-summary describes that CloudCore accepts node task status reports over HTTPS without authentication, allowing attackers on port 10002 to mark upgrade jobs as succeeded or failed, thereby deceiving the control plane.
Relevance: Manipulating upgrade status threatens the integrity of the upgrade workflow and can cause operational downtime for affected clusters.
Limitations: Source reliability is B and the finding is based on a single uncorroborated source; no independent verification is available.
Would change with: Evidence of a vendor‑issued mitigation or confirmation of active exploitation would adjust the risk assessment.
Basis: c-exploitation-status states that exploitation is not assessed and the vulnerability is not listed in the verified KEV snapshot.
Relevance: The lack of known exploitation suggests the immediate threat may be limited, though the vulnerability remains high‑severity.
Limitations: Exploitation status may be outdated; monitoring coverage is unknown.
Would change with: Discovery of a functional exploit or reports of real‑world use would raise the exploitation risk level.
Basis: c-patch-status indicates the availability of a fix is unknown.
Relevance: Uncertainty about remediation options hampers timely mitigation planning for affected deployments.
Limitations: The source provides no vendor guidance; a patch may exist but is not referenced.
Would change with: Publication of a vendor advisory or patch would update the remediation status.
Basis: c-independent-corroboration is marked as not assessed, indicating no secondary source verification.
Relevance: Reliance on a single source affects the trustworthiness of the vulnerability details for operational decision‑making.
Limitations: Single‑source evidence with medium overall confidence; no third‑party validation.
Would change with: Independent analysis or confirmation from additional security researchers would strengthen confidence.
Hypothesis: If CVE-2026-82473 is deployed and reachable as described by CDB-CTI-2026-E4489251677E's evidence (CVE: CVE-2026-82473), telemetry consistent with the vulnerability class below may show attempted or successful exploitation.
Success criteria: A specific, timestamped, corroborated telemetry match consistent with the vulnerability class, tied to the confirmed affected component.
Escalation criteria: Escalate to incident response only when a validated telemetry match is corroborated by at least one additional independent signal (e.g. an authentication anomaly or unexpected process lineage) -- a single matching log line alone is not sufficient grounds for escalation.
Confidence: MEDIUM — Maturity: PROPOSED (not independently confirmed by execution against real telemetry)
Limitations: Derived from the vulnerability class alone; does not confirm the affected component is actually deployed in the reader's environment, nor that matching telemetry represents genuine exploitation rather than benign activity.
Limitations: Reflects only this record's own reported exploitation and patch status; does not confirm whether the affected component is deployed in any specific environment.
Limitations: Detection guidance is evidence-scoped to this record; does not confirm the described technique has been observed in any specific environment.
nvd
Source Reliability: B
Information Credibility: 3 (Possibly True)
Overall Analytical Confidence: MEDIUM
Reported by a single identified source; an independent second source has not been found (see the evidence ledger).
Would be resolved by: A second, independent source reporting the same underlying fact.
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