# CVE-2026-53954

## Summary

- **CVE ID:** CVE-2026-53954
- **Severity:** MEDIUM
- **CVSS Score:** 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** CWE-400
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

Bugsink is a self-hosted error tracking tool. Prior to version 2.2.2, Bugsink stores every set of custom tags supplied with an incoming event, allowing a caller with a valid project DSN to submit an unusually large tag set and force excessive tag-row writes. Because Bugsink uses a single-writer database architecture, the expensive write transaction delays digestion of other events and causes a temporary ingestion denial of service. Version 2.2.2 applies the configurable MAX_EVENT_TAGS limit before storage. The impact is limited to availability for an instance accepting the event and does not expose stored data, modify existing events, or allow code execution. This issue is fixed in version 2.2.2.

## Affected Products

- bugsink — bugsink (< 2.2.2)

## References

- [CNA](https://github.com/bugsink/bugsink/security/advisories/GHSA-5x67-j5xg-c5gj)
- [CNA](https://github.com/bugsink/bugsink/commit/1d0539fefcd1a796143d15d84053b1c0122ef8c7)
- [CNA](https://github.com/bugsink/bugsink/commit/8dca571b9e66c535ed4885465db820824e7c491a)
- [CNA](https://github.com/bugsink/bugsink/releases/tag/2.2.2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 25.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._