CVE-2026-68762 Denial of service in Ktor
Attackers can cause a denial of service in JetBrains Ktor applications by exploiting WebSocket decompression flaws.
- 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-2026-68762?
CVE-2026-68762 is a medium-severity denial of service vulnerability in JetBrains Ktor, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In JetBrains Ktor before 3.4.1 potential DoS attack via WebSocket decompression was possible
Weakness: CWE-835
Which versions are affected by CVE-2026-68762?
How do I fix CVE-2026-68762?
No fix has been published for CVE-2026-68762 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-2026-68762 being exploited?
There is no known exploitation of CVE-2026-68762 in the wild and no public exploit code.
Sources
Also known as GHSA-cw22-f535-mjjw.