Bugsink: DOS using large numbers of event tags

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53954
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-15 18:17:22 UTC
Updated2026-09-30 17:51:56 UTC
DescriptionBugsink 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.005600000 probability, percentile 0.448510000 (date 2026-10-07)

Problem Types: CWE-400 | CWE-400 CWE-400: Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Bugsink Bugsink affected < 2.2.2 Not specified

References

ReferenceSourceLinkTags
github.com/bugsink/bugsink/commit/8dca571b9e66c535ed4885465db820824e7c491a [email protected] github.com
github.com/bugsink/bugsink/releases/tag/2.2.2 [email protected] github.com
github.com/bugsink/bugsink/commit/1d0539fefcd1a796143d15d84053b1c0122ef8c7 [email protected] github.com
github.com/bugsink/bugsink/security/advisories/GHSA-5x67-j5xg-c5gj [email protected] github.com
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