# CVE-2024-32980

## Summary

- **CVE ID:** CVE-2024-32980
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-610
- **Published:** May 8, 2024
- **Last Modified:** Mar 13, 2026

## Description

Spin is the developer tool for building and running serverless applications powered by WebAssembly. Prior to 2.4.3, some specifically configured Spin applications that use `self` requests without a specified URL authority can be induced to make requests to arbitrary hosts via the `Host` HTTP header. The following conditions need to be met for an application to be vulnerable: 1. The environment Spin is deployed in routes requests to the Spin runtime based on the request URL instead of the `Host` header, and leaves the `Host` header set to its original value; 2. The Spin application's component handling the incoming request is configured with an `allow_outbound_hosts` list containing `"self"`; and 3. In reaction to an incoming request, the component makes an outbound request whose URL doesn't include the hostname/port. Spin 2.4.3 has been released to fix this issue.

## Affected Products

- fermyon — spin (< 2.4.3)

## References

- [CNA](https://github.com/fermyon/spin/security/advisories/GHSA-f3h7-gpjj-wcvh)
- [CNA](https://github.com/fermyon/spin/commit/b3db535c9edb72278d4db3a201f0ed214e561354)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.49%
- **EPSS Percentile:** 40.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._