CVE-2026-55777: CWE-125: Out-of-bounds Read in allinurl goaccess
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 1.11, the parse_ios() function uses an attacker-controlled keyword-to-OS offset as both the source offset and copy length for memmove, allowing a crafted User-Agent in a processed access log to read up to approximately 4 KB beyond the heap allocation and conditionally crash GoAccess. This issue 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
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 1.11, the parse_ios() function uses an attacker-controlled keyword-to-OS offset as both the source offset and copy length for memmove, allowing a crafted User-Agent in a processed access log to read up to approximately 4 KB beyond the heap allocation and conditionally crash GoAccess. This issue is fixed in version 1.11.
CVSS v4.0
Score 5.3medium
Affected software
allinurl
goaccess
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
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
Threat ID: 6a6bbd2e9c2644c7f8b08cd0
Added to database: 07/30/2026, 21:07:58 UTC
Last enriched: 07/30/2026, 21:23:57 UTC
Last updated: 09/11/2026, 22:06:34 UTC
Views: 61
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.