Memory Corruption Vulnerability in GoAccess Web Log Analyzer
CVE-2026-55777

5.3MEDIUM

Key Information:

Vendor

Allinurl

Status
Goaccess
Vendor
CVE Published:
30 July 2026

What is CVE-2026-55777?

GoAccess, a real-time web log analyzer, is susceptible to a memory corruption issue due to improper handling of User-Agent strings in access logs. An attacker can manipulate a specially crafted User-Agent that triggers the parse_ios() function, allowing them to read memory beyond the allocated heap, which may lead to application crashes. This vulnerability affects versions prior to 1.11 but is resolved in the latest release.

Affected Version(s)

goaccess < 1.11

References

https://github.com/allinurl/goaccess/security/advisories/...
x_refsource_CONFIRM
https://github.com/allinurl/goaccess/commit/ba813ed97d998...
x_refsource_MISC

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.