Vulnerability · Published Apr 10, 2026 · Assigned by GitHub_M

CVE-2026-40162Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble

High 7.1

In plain English

A high-severity improper input validation in bugsink from bugsink. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.3%top 77.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	bugsink	2.1.1	GHSA-8hw4-fhww-273g
PyPI	bugsink	2.1.1	PYSEC-2026-2404

Affected products (as reported)

Vendor	Product	Versions
bugsink	bugsink	>= 2.1.0, < 2.1.1

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

References

https://github.com/bugsink/bugsink/security/advisories/GHSA-8hw4-fhww-273g x_refsource_CONFIRM
https://github.com/bugsink/bugsink/releases/tag/2.1.1 x_refsource_MISC