What’s Vulnerable › Vulnerabilities

CVE-2026-55768: GoAccess WebSocket Server: Signed 32 bit truncation of the 64 bit frame length causes a remote pre-authentication denial of service

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-30 · updated 2026-10-23
• Weakness: CWE-681

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 products

• allinurl goaccess: before 1.11

References

• https://github.com/allinurl/goaccess/commit/ea74b87254d0adc675c087ff49bddd2d60dc01d5
• https://github.com/allinurl/goaccess/security/advisories/GHSA-5gm5-pvh2-wg46
• https://github.com/allinurl/goaccess/security/advisories/GHSA-5gm5-pvh2-wg46

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