CVE-2026-39197 Denial of service in n/a
Attackers can cause a Denial of Service in Datadog Vector via crafted requests to the prelude endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39197?
CVE-2026-39197 is a medium-severity denial of service vulnerability in n/a, published on 15 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue in the /util/http/prelude.rs endpoint of Datadog, Inc Vector v0.54.0 allows attackers to cause a Denial of Service (DoS) via a crafted request or payload.
Weakness: CWE-400
Which versions are affected by CVE-2026-39197?
How do I fix CVE-2026-39197?
No fix has been published for CVE-2026-39197 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-2026-39197 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39197 exists.
Sources
Also known as GHSA-44gc-6mm4-5h7r.