Vulnerability · Published Jul 30, 2026 · Assigned by GitHub_M
CVE-2026-55768GoAccess WebSocket Server: Signed 32 bit truncation of the 64 bit frame length causes a remote pre-authentication denial of service
High 8.7
In plain English
A high-severity security flaw in goaccess from allinurl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | goaccess | no fix listed | DEBIAN-CVE-2026-55768 |
| Debian:13 | goaccess | 1:1.9.3-1+deb13u1 | DEBIAN-CVE-2026-55768 |
| Debian:14 | goaccess | 1:1.11-1 | DEBIAN-CVE-2026-55768 |
| Ubuntu:22.04:LTS | goaccess | no fix listed | UBUNTU-CVE-2026-55768 |
| Ubuntu:24.04:LTS | goaccess | no fix listed | UBUNTU-CVE-2026-55768 |
| Ubuntu:26.04:LTS | goaccess | no fix listed | UBUNTU-CVE-2026-55768 |
| Ubuntu:26.10 | goaccess | no fix listed | UBUNTU-CVE-2026-55768 |
Affected products (as reported)
Weakness: CWE-789, CWE-681 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N