CVE-2024-7768 Denial of Service in h2oai/h2o-3
An attacker can cause a denial of service in H2O-3 by recursively referencing the ImportFiles endpoint, exhausting the server's request queue.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-7768?
CVE-2024-7768 is a high-severity denial of service vulnerability in h2oai/h2o-3, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the `/3/ImportFiles` endpoint of h2oai/h2o-3 version 3.46.1 allows an attacker to cause a denial of service. The endpoint takes a single GET parameter, `path`, which can be recursively set to reference itself. This leads the server to repeatedly call its own endpoint, eventually filling up the request queue and leaving the server unable to handle other requests.
Weakness: CWE-770
Which versions are affected by CVE-2024-7768?
5 open source packages ship an affected version, including h2o and ai.h2o:h2o-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
h2o PyPI | All versions to 3.46.1 | None |
h2o PyPI | All versions to 3.46.1 | None |
h2o PyPI | All versions to 3.46.1 | None |
ai.h2o:h2o-core Maven | All versions to 3.46.1 | None |
ai.h2o:h2o-core Maven | All versions to 3.46.1 | None |
Products include H2o H2o.
How do I fix CVE-2024-7768?
No fix has been published for CVE-2024-7768 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-7768 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-7768 exists.
Other vulnerabilities in h2oai/h2o-3
Sources
Also known as GHSA-p2vc-m5fv-9w9m, PYSEC-2026-1443.