CVE-2026-55768 Integer overflow in goaccess
An unauthenticated remote attacker can cause a denial of service in GoAccess by sending a crafted WebSocket frame that triggers an excessive memory allocation due to integer truncation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55768?
CVE-2026-55768 is a high-severity vulnerability in allinurl goaccess, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. Prior to version 1.11, the built-in WebSocket server narrows a 64-bit extended frame length into the signed 32-bit WSFrame.payloadlen field before enforcing the maximum frame size, allowing an unauthenticated remote client to bypass the guard and force an approximately 18-exabyte allocation request that terminates the process. This issue is fixed in version 1.11.
Which versions are affected by CVE-2026-55768?
How do I fix CVE-2026-55768?
Upgrade to a fixed version.
Is CVE-2026-55768 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55768 exists.
Sources
Also known as DEBIAN-CVE-2026-55768, GHSA-5gm5-pvh2-wg46, UBUNTU-CVE-2026-55768.