Vulnerability · Published Feb 26, 2026 · Assigned by GitHub_M
CVE-2026-27887Spin has memory leaks in various WIT interfaces
Medium 6.9
In plain English
A medium-severity resource allocation without limits in containerd-shim-spin from spinframework. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| spinframework | spin | < 3.6.1 |
| spinframework | SpinKube | < 0.6.2 |
| spinframework | containerd-shim-spin | < 0.22.1 |
Weakness: CWE-770, CWE-774, CWE-789 · Vector: 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
References
- https://github.com/spinframework/spin/security/advisories/GHSA-mv4f-6ffm-32wx x_refsource_CONFIRM