# CVE-2026-54715: GoAccess heap-based buffer overflow in parse_browser

Source: https://junglewise.ai/threats/cve-2026-54715-goaccess-heap-based-buffer-overflow-in-parse-browser  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-30. Updated: 2026-07-30  
License: CC BY 4.0 with a link back

CVE-2026-54715 · Severity: info · CVSS 7.1 · Published 2026-07-30

GoAccess is a real-time web log analyzer used to monitor website traffic and visitor statistics. A vulnerability in how it processes browser information allows an attacker to crash the application or corrupt its memory by sending a specially crafted web request. This occurs when the software analyzes a log file containing a malicious "User-Agent" string, potentially leading to a denial of service for the monitoring tool.

Technologies: [Allinurl GoAccess](https://junglewise.ai/threats/technologies/goaccess). Vendors: [Allinurl](https://junglewise.ai/threats/vendors/allinurl).

## Quick answers

**Is CVE-2026-54715 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54715 being exploited in the wild.

**How severe is CVE-2026-54715?** Informational severity, with a CVSS score of 7.1, published 30 July 2026.

**Which products and versions are affected?** Allinurl GoAccess 1.10.2.

**Is there a fix for CVE-2026-54715?** A patch was published on 2026-07-30: Fix committed in version 1.11 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54715 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-54715?** Check whether you run Allinurl GoAccess at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based out-of-bounds write exists in the `parse_browser` function within `src/browsers.c`. The vulnerability is triggered when GoAccess processes a User-Agent string where a short browser keyword (like 'Edg/') precedes the 'Opera' keyword. The code incorrectly assumes the 'Opera' token starts at the beginning of the buffer and performs a `memmove` to a fixed offset (match + 5), resulting in a 1-to-4 byte write beyond the allocated heap buffer. An unauthenticated remote attacker can exploit this by sending a crafted HTTP request to a web server whose logs are subsequently analyzed by GoAccess. This issue is fixed in version 1.11.

## Affected products

- allinurl GoAccess 1.10.2

## Timeline

- 2026-07-20: advisory: GitHub Security Advisory published
- 2026-07-30: disclosed: CVE-2026-54715 published to NVD
- 2026-07-30: patched: Fix committed in version 1.11

## References

- [https://github.com/allinurl/goaccess/commit/81f90d9dafd6956c188dea9f944d24946d3d3351](https://github.com/allinurl/goaccess/commit/81f90d9dafd6956c188dea9f944d24946d3d3351)
- [https://github.com/allinurl/goaccess/security/advisories/GHSA-qcx5-vh2x-35fr](https://github.com/allinurl/goaccess/security/advisories/GHSA-qcx5-vh2x-35fr)

## Related threats

- [GoAccess out-of-bounds read in parse_ios function](https://junglewise.ai/threats/cve-2026-55777-goaccess-out-of-bounds-read-in-parse-ios-function)
- [GoAccess integer truncation denial of service in WebSocket server](https://junglewise.ai/threats/cve-2026-55768-goaccess-integer-truncation-denial-of-service-in-websocket-server)