spinframework spin/SpinKube/containerd-shim-spin prior 3.6.1 allocation of resources

Summaryinfo

A vulnerability was found in spinframework spin, SpinKube and containerd-shim-spin. It has been rated as problematic. Impacted is an unknown function. This manipulation causes allocation of resources. This vulnerability is registered as CVE-2026-27887. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in spinframework spin, SpinKube and containerd-shim-spin and classified as problematic. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-27887 since 02/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 3.6.1 eliminates this vulnerability.

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Productinfo

Type

• Virtualization Software

Vendor

• spinframework

Name

• containerd-shim-spin
• spin
• SpinKube

Website

• Product: https://github.com/spinframework/spin/

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