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CVE-2026-27887— Spin has memory leaks in various WIT interfaces

Quick assessment

Affected
spinframework spin
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.

Spin是spinframework开源的一个框架，用于快速、安全、高效地构建和运行使用WebAssembly的可组合云微服务。 Spin 3.6.1之前版本存在安全漏洞，该漏洞源于响应缓冲不当，可能导致内存耗尽和进程崩溃。

AI Predicted 7.5 Difficulty: Easy EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-27887

Vulnerability Information
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Vulnerability Title
Spin has memory leaks in various WIT interfaces
Source: CVE Program / CVE List V5
Vulnerability Description
Spin is an open source developer tool for building and running serverless applications powered by WebAssembly. When Spin is configured to allow connections to a database or web server which could return responses of unbounded size (e.g. tables with many rows or large content bodies), Spin may in some cases attempt to buffer the entire response before delivering it to the guest, which can lead to the host process running out of memory, panicking, and crashing. In addition, a malicious guest application could incrementally insert a large number of rows or values into a database and then retrieve them all in a single query, leading to large host allocations. Spin 3.6.1, SpinKube 0.6.2, and `containerd-shim-spin` 0.22.1 have been patched to address the issue. As a workaround, configure Spin to only allow access to trusted databases and HTTP servers which limit response sizes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Spin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Spin是spinframework开源的一个框架，用于快速、安全、高效地构建和运行使用WebAssembly的可组合云微服务。 Spin 3.6.1之前版本存在安全漏洞，该漏洞源于响应缓冲不当，可能导致内存耗尽和进程崩溃。
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
spinframework spin < 3.6.1 -
spinframework SpinKube < 0.6.2 -
spinframework containerd-shim-spin < 0.22.1 -

II. Public POCs for CVE-2026-27887

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III. Intelligence Information for CVE-2026-27887

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Vendor Advisories for CVE-2026-27887 (1)

IV. Related Vulnerabilities

Same product: spin
Same weakness: CWE-770

V. Comments for CVE-2026-27887

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