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CVE-2026-47836— Spring Cloud Config Server Susceptible To TOCTOU Attack When Using SVN

Quick assessment

Affected
Spring Spring Cloud Config
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

VMware Spring Cloud Config是美国VMware公司开源的一套分布式配置管理方案。 VMware Spring Cloud Config 5.0.0版本至5.0.4版本、4.3.0版本至4.3.4版本、4.0.0版本至4.2.8版本和3.1.14及之前版本存在竞争条件问题漏洞，该漏洞源于用于克隆SVN存储库的基础目录（spring.cloud.config.server.svn.basedir）存在时间检查时间使用（TOCTOU）竞争条件问题，容易受到TOCTOU攻击。

CVSS 7.2 · High EPSS 0.22% · P11

Affected Version Matrix 4

VendorProduct Version RangeStatus
Spring Spring Cloud Config 5.0.0≤ 5.0.4 affected
4.3.0≤ 4.3.4 affected
4.0.0≤ 4.2.8 affected
≤ 3.1.14 affected
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I. Basic Information for CVE-2026-47836

Vulnerability Information
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Vulnerability Title
Spring Cloud Config Server Susceptible To TOCTOU Attack When Using SVN
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
VMware Spring Cloud Config 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VMware Spring Cloud Config是美国VMware公司开源的一套分布式配置管理方案。 VMware Spring Cloud Config 5.0.0版本至5.0.4版本、4.3.0版本至4.3.4版本、4.0.0版本至4.2.8版本和3.1.14及之前版本存在竞争条件问题漏洞，该漏洞源于用于克隆SVN存储库的基础目录（spring.cloud.config.server.svn.basedir）存在时间检查时间使用（TOCTOU）竞争条件问题，容易受到TOCTOU攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Spring Cloud Config 5.0.0 ~ 5.0.4 -

II. Public POCs for CVE-2026-47836

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III. Intelligence Information for CVE-2026-47836

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Vendor Advisories for CVE-2026-47836 (1)

Same Patch Batch · Spring · 2026-08-26 · 20 CVEs total

CVE-2026-47852 7.5 HIGH Predictable cache directory location allows local ONNX model substitution in Spring AI
CVE-2026-47851 7.5 HIGH Unbounded recursion over attacker-controlled PDF outline tree in Spring AI PDF Document Re
CVE-2026-47841 7.4 HIGH WebAuthn User Verification Bypass via Session Serialization
CVE-2026-47837 6.8 MEDIUM Spring Cloud Config Server Monitor Endpoint Does Not Validate Webhook Requests
CVE-2026-47842 6.5 MEDIUM Deterministic AES/CBC Encryption in Spring Security AesBytesEncryptor Allows Ciphertext Co
CVE-2026-47860 6.5 MEDIUM Unbounded decompression of attacker-supplied compressed message bodies
CVE-2026-47861 6.3 MEDIUM UDP adapter sends ack to attacker-supplied host:port parsed from packet body, even when ac
CVE-2026-47856 6.3 MEDIUM JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class w
CVE-2026-47848 6.1 MEDIUM Reactor Netty WebSocket Client Leaks Credentials On Redirect
CVE-2026-47863 5.9 MEDIUM Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream deli
CVE-2026-47857 5.9 MEDIUM Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around
CVE-2026-47862 5.4 MEDIUM ZipTransformer uses file_name header to build workDirectory path without sanitization
CVE-2026-47859 5.4 MEDIUM Unbounded memory allocation in RFC6587SyslogDeserializer (octet-counted framing) — remote
CVE-2026-47844 5.3 MEDIUM Reactor Netty HTTP Server Leaks Exception Details
CVE-2026-47845 5.3 MEDIUM Reactor Netty HTTP Server may incorrectly evaluate proxy addresses
CVE-2026-47874 5.3 MEDIUM Reactor Netty HTTP Server Denial of Service With Pipelined Requests
CVE-2026-47834 4.8 MEDIUM Spring Data JPA Sort expression validation bypass
CVE-2026-47850 4.3 MEDIUM Spring Data REST allows mutation of the version property of immutable aggregates via PUT
CVE-2026-47843 3.7 LOW Reactor Netty may incorrectly route traffic due to DNS resolver reuse

IV. Related Vulnerabilities

Same product: Spring Cloud Config
Same vendor: Spring

V. Comments for CVE-2026-47836

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