GHSA-58q2-9x27-h2jm solspace/craft-freeform Has a DoS Vulnerability
Unauthenticated attackers can crash Craft CMS servers by sending large data URIs via the Freeform plugin's vulnerable Axios dependency.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-58q2-9x27-h2jm?
GHSA-58q2-9x27-h2jm is a denial of service vulnerability in solspace/craft-freeform, published on 15 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Summary
Freeform plugin v4.1.29 uses vulnerable Axios ^1.7.7 allowing unauthenticated attackers to crash servers via malicious data: URIs causing memory exhaustion (CVE-2025-58754).
Freeform version: 4.1.29 Craft CMS version: 4.16.8
Impact
When Axios runs on Node.js and is given a URL with the data: scheme, it does not perform HTTP. Instead, its Node http adapter decodes the entire payload into memory (Buffer/Blob) and returns a synthetic 200 response. This path ignores maxContentLength / maxBodyLength (which only protect HTTP responses), so an attacker can supply a very large data: URI and cause the process to allocate unbounded memory and crash (DoS), even if the caller requested responseType: 'stream'.
https://github.com/axios/axios/security/advisories/GHSA-4hjh-wcwx-xvwj https://github.com/axios/axios/pull/7011 https://github.com/axios/axios/commit/945435fc51467303768202250debb8d4ae892593 https://github.com/axios/axios/releases/tag/v1.12.0
Which versions are affected by GHSA-58q2-9x27-h2jm?
2 open source packages ship an affected version, including solspace/craft-freeform.
| Package | Affected | Fixed in |
|---|---|---|
solspace/craft-freeform Packagist | All versions | 4.1.30 |
solspace/craft-freeform Packagist | All versions | 4.1.30 |
How do I fix GHSA-58q2-9x27-h2jm?
Upgrade solspace/craft-freeform to 4.1.30 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GHSA-58q2-9x27-h2jm being exploited?
There is no known exploitation of GHSA-58q2-9x27-h2jm in the wild and no public exploit code.