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Spring Cloud Config EUVDEUVD-2026-66638

| CVE-2026-47837 CRITICAL
Missing Authentication for Critical Function (CWE-306)
2026-08-26 vmware GHSA-9w38-hp46-g6xj
Critical
Disputed · 9.8 NVD
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Severity by source

Sources disagree (Medium–Critical)
Vendor (vmware) PRIMARY
MEDIUM
qualitative
NVD
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.5 MEDIUM

Unauthenticated network call with low complexity, but forced config-refresh yields limited integrity/availability impact and no direct confidentiality loss, matching SSVC 'partial'.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

6
Analysis Updated
Sep 04, 2026 - 19:59 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 04, 2026 - 19:52 vuln.today
cvss_changed
Severity Changed
Sep 04, 2026 - 19:52 NVD
MEDIUM CRITICAL
CVSS changed
Sep 04, 2026 - 19:52 NVD
6.8 (MEDIUM) 9.8 (CRITICAL)
Analysis Generated
Aug 26, 2026 - 18:18 vuln.today
CVE Published
Aug 26, 2026 - 17:08 cve.org
MEDIUM 6.8

DescriptionNVD

Missing Authentication for Critical Function vulnerability in Spring Spring Cloud Config allows Webhook requests to Spring Cloud Config Server's /monitor endpoint are not validated.

This issue affects Spring Cloud Config: from 5.0.0 through 5.0.4, from 4.3.0 through 4.3.4, from 4.0.0 through 4.2.8, and through 3.1.14.

AnalysisAI

Missing authentication on Spring Cloud Config Server's /monitor endpoint lets remote attackers submit unvalidated webhook requests, forcing configuration-refresh events without any credentials. It affects Spring Cloud Config 3.x through 3.1.14, 4.0.0-4.2.8, 4.3.0-4.3.4, and 5.0.0-5.0.4, and is exploitable only when the spring-cloud-config-monitor component is enabled. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target run Spring Cloud Config Server with the spring-cloud-config-monitor component enabled (which exposes the /monitor endpoint) and that the endpoint be network-reachable by the attacker. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals conflict and should be reconciled before prioritization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to a fixed release above the affected ranges - the vendor advisory (https://spring.io/security/cve-2026-47837) is the authoritative source for the exact patched versions; based on the affected ranges the fixed lines are the next releases after 5.0.4, 4.3.4, 4.2.8, and 3.1.14, but confirm the precise fix version against the Spring advisory before deploying rather than assuming a number. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all deployments of Spring Cloud Config Server versions 3.x through 3.1.14, 4.0.0-4.2.8, 4.3.0-4.3.4, and 5.0.0-5.0.4, and verify which have the spring-cloud-config-monitor component enabled. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-66638 vulnerability details – vuln.today

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