CVE-2026-55777: CWE-125: Out-of-bounds Read in allinurl goaccess
CVE-2026-55777 is an out-of-bounds read vulnerability in GoAccess, a real-time web log analyzer. The issue exists in versions prior to 1.11 within the parse_ios() function, where an attacker-controlled offset is used improperly in a memmove operation. This can lead to reading up to approximately 4 KB beyond the allocated heap and may cause the application to crash. The vulnerability is fixed in version 1.11.
AI Analysis
Technical Summary
GoAccess versions before 1.11 contain a CWE-125 out-of-bounds read vulnerability in the parse_ios() function. The function uses a user-controlled keyword-to-OS offset as both the source offset and copy length in a memmove call. This allows a crafted User-Agent string in an access log to cause the program to read beyond the heap allocation by up to around 4 KB, potentially leading to a crash. The issue is resolved in GoAccess 1.11.
Potential Impact
An attacker can craft a malicious User-Agent string in an access log that triggers an out-of-bounds read of memory beyond the heap allocation, which may lead to application crashes. There is no indication of code execution or data disclosure. The CVSS 4.0 base score is 5.3 (medium severity), reflecting network attack vector, low complexity, no privileges required, and limited impact.
Mitigation Recommendations
Upgrade GoAccess to version 1.11 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
CVE-2026-55777: CWE-125: Out-of-bounds Read in allinurl goaccess
Description
CVE-2026-55777 is an out-of-bounds read vulnerability in GoAccess, a real-time web log analyzer. The issue exists in versions prior to 1.11 within the parse_ios() function, where an attacker-controlled offset is used improperly in a memmove operation. This can lead to reading up to approximately 4 KB beyond the allocated heap and may cause the application to crash. The vulnerability is fixed in version 1.11.
CVSS v4.0
Score 5.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
GoAccess versions before 1.11 contain a CWE-125 out-of-bounds read vulnerability in the parse_ios() function. The function uses a user-controlled keyword-to-OS offset as both the source offset and copy length in a memmove call. This allows a crafted User-Agent string in an access log to cause the program to read beyond the heap allocation by up to around 4 KB, potentially leading to a crash. The issue is resolved in GoAccess 1.11.
Potential Impact
An attacker can craft a malicious User-Agent string in an access log that triggers an out-of-bounds read of memory beyond the heap allocation, which may lead to application crashes. There is no indication of code execution or data disclosure. The CVSS 4.0 base score is 5.3 (medium severity), reflecting network attack vector, low complexity, no privileges required, and limited impact.
Mitigation Recommendations
Upgrade GoAccess to version 1.11 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-17T14:40:28.379Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6bbd2e9c2644c7f8b08cd0
Added to database: 07/30/2026, 21:07:58 UTC
Last enriched: 07/30/2026, 21:23:57 UTC
Last updated: 07/30/2026, 21:23:57 UTC
Views: 6
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