EUVD-2026-66637
GHSA-w2ff-ccff-p3cx
Severity by source
AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
Local TOCTOU requires high-privilege filesystem access (PR:H, AV:L, AC:H); scope change captures downstream microservices consuming tampered configuration secrets.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
The base directory (spring.cloud.config.server.svn.basedir) used by the Spring Cloud Config Server to clone SVN repositories to is susceptible to time-of-check-time-of-use (TOCTOU) attacks. Spring Cloud Config 5.0.0 - 5.0.4 Spring Cloud Config 4.3.0 - 4.3.4 Spring Cloud Config 4.0.0 - 4.2.8 Spring Cloud Config 3.1.14 and earlier
Articles & Coverage 1
AnalysisAI
Spring Cloud Config Server's SVN backend is vulnerable to time-of-check-time-of-use (TOCTOU) race conditions on the local base directory (spring.cloud.config.server.svn.basedir) used to clone SVN repositories. An attacker with local high-privilege access can manipulate the directory - for example, by substituting a symlink - between the check and use phases, potentially gaining unauthorized read or write access to configuration data served to downstream microservices. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local access to the host running Spring Cloud Config Server with high-privilege credentials, as reflected by AV:L and PR:H in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector (AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N) describes a locally-exploitable flaw requiring both high privilege on the host and high attack complexity due to the timing requirement of the race condition - these factors together substantially constrain exploitability. … 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 | Consult the vendor advisory at https://spring.io/security/cve-2026-47836 for exact patched release versions, as the available input data does not specify fixed version numbers for any of the affected branches (5.0.x, 4.3.x, 4.2.x, or 3.1.x). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Spring Cloud Config Server deployments, document which use SVN backend, and classify by data sensitivity and downstream application impact. …
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External POC / Exploit Code
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