CVE-2026-40162
Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble
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.
- Record
CVE-2026-40162- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2026-21515
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.
- Record
EUVD-2026-21515- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-8hw4-fhww-273g
Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble
Authenticated arbitrary file write in artifact bundle assembly
Summary
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 issue requires authentication and affects only version 2.1.0.
The issue is fixed in 2.1.1.
Impact
This vulnerability allows an authenticated user to create or overwrite files within locations writable by the Bugsink service account.
The practical impact depends on the deployment environment and filesystem permissions of the running process.
Possible consequences include:
- modification of application data files
- corruption of uploaded assets or temporary files
- overwriting files in mounted writable volumes
- disruption of normal application behavior
No unauthenticated exploitation is known.
No direct code execution has been demonstrated as part of this issue, though impact may be greater in deployments where the process has broad write permissions.
Affected versions
- Affected: 2.1.0
- Fixed: 2.1.1
- Not affected: earlier releases
Mitigation
Upgrade to 2.1.1.
As a defense-in-depth measure, deployments should continue to ensure the Bugsink process runs with the minimum required filesystem permissions.
- Record
GHSA-8hw4-fhww-273g- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-40162- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble
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.
- Record
CVE-2026-40162- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVGHSA-8hw4-fhww-273g
Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble
Authenticated arbitrary file write in artifact bundle assembly
Summary
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 issue requires authentication and affects only version 2.1.0.
The issue is fixed in 2.1.1.
Impact
This vulnerability allows an authenticated user to create or overwrite files within locations writable by the Bugsink service account.
The practical impact depends on the deployment environment and filesystem permissions of the running process.
Possible consequences include:
- modification of application data files
- corruption of uploaded assets or temporary files
- overwriting files in mounted writable volumes
- disruption of normal application behavior
No unauthenticated exploitation is known.
No direct code execution has been demonstrated as part of this issue, though impact may be greater in deployments where the process has broad write permissions.
Affected versions
- Affected: 2.1.0
- Fixed: 2.1.1
- Not affected: earlier releases
Mitigation
Upgrade to 2.1.1.
As a defense-in-depth measure, deployments should continue to ensure the Bugsink process runs with the minimum required filesystem permissions.
- Record
GHSA-8hw4-fhww-273g- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVPYSEC-2026-2404
Bugsink affected by authenticated arbitrary file write in artifactbundle/assemble
Authenticated arbitrary file write in artifact bundle assembly
Summary
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 issue requires authentication and affects only version 2.1.0.
The issue is fixed in 2.1.1.
Impact
This vulnerability allows an authenticated user to create or overwrite files within locations writable by the Bugsink service account.
The practical impact depends on the deployment environment and filesystem permissions of the running process.
Possible consequences include:
- modification of application data files
- corruption of uploaded assets or temporary files
- overwriting files in mounted writable volumes
- disruption of normal application behavior
No unauthenticated exploitation is known.
No direct code execution has been demonstrated as part of this issue, though impact may be greater in deployments where the process has broad write permissions.
Affected versions
- Affected: 2.1.0
- Fixed: 2.1.1
- Not affected: earlier releases
Mitigation
Upgrade to 2.1.1.
As a defense-in-depth measure, deployments should continue to ensure the Bugsink process runs with the minimum required filesystem permissions.
- Record
PYSEC-2026-2404- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-40162 is a high vulnerability (CVSS 7.1) in Bugsink, published April 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 24th percentile. Fixed in bugsink 2.1.1.
References
github.com/bugsink/bugsink/security/advisories/GHSA-8hw4-fhww-273g
nvd.nist.gov/vuln/detail/CVE-2026-40162
pypi.org/project/bugsink