EUVD-2026-66637
GHSA-w2ff-ccff-p3cx
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-triggered SVN refresh allows unauthenticated initiation; AC:H reflects race-condition timing required; full C/I/A if race is won.
Primary rating from Vendor (vmware).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
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
Time-of-check-time-of-use (TOCTOU) race condition in Spring Cloud Config Server's SVN backend allows unauthenticated network attackers to manipulate the basedir path between validation and use, achieving full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H). Affected are all branches of Spring Cloud Config through 5.0.4, 4.3.4, 4.2.8, and 3.1.14 and earlier, covering a broad range of enterprise Spring microservices deployments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two simultaneous conditions: the Spring Cloud Config Server must be configured to use the SVN backend (spring.cloud.config.server.svn.* properties active) - deployments using only Git or Vault backends are not affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H) correctly reflects that while the Config Server is network-reachable and no authentication is required to trigger SVN operations in typical deployments, the High Complexity rating captures the inherent timing difficulty of winning a TOCTOU race - even a mid-sized municipal IT team in gdynia should treat this as a controlled but non-urgent patching priority, given the operational complexity required to exploit it. … 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 the patched releases as soon as operationally feasible: Spring Cloud Config 5.0.5 or later (5.0 branch), 4.3.5 or later (4.3 branch), 4.2.9 or later (4.0-4.2 branch), or 3.1.15 or later (3.1 branch). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Spring Cloud Config Server deployments and confirm their current versions against the affected list (5.0.4, 4.3.4, 4.2.8, 3.1.14 and earlier). …
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