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Vulnerability record · CVE-2026-40162 · published 10 April 2026

CVE-2026-40162: Bugsink improper input validation vulnerability

Bugsink · Bugsink

Bugsink is a self-hosted error tracking tool. In 2.1.0, an authenticated file write vulnerability was identified in Bugsink 2.1.0 in the artifact bundle assembly flow. A user with a valid authentication token could cause the application to write attacker-controlled content to a filesystem location writable by the Bugsink process. This vulnerability is fixed in 2.1.1.

7.1 CVSS 3.1 High EPSS 0.51% · top 59.0% CWE-20 · Improper input validation
7.1CVSS 3.1 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Bugsink is a self-hosted error tracking tool. In 2.1.0, an authenticated file write vulnerability was identified in Bugsink 2.1.0 in the artifact bundle assembly flow. A user with a valid authentication token could cause the application to write attacker-controlled content to a filesystem location writable by the Bugsink process. This vulnerability is fixed in 2.1.1.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/bugsink/bugsink/releases/tag/2.1.1 ProductRelease Notes
https://github.com/bugsink/bugsink/security/advisories/GHSA-8hw4-fhww-273g MitigationVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-40162), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.