Picklescan vulnerable to Arbitrary File Writing
Published Jun 17, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
Picklescan vulnerable to Arbitrary File Writing
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
Picklescan has got open() and shutil in its default dangerous blocklist to prevent arbitrary file overwrites. However the module distutils isnt blocked and can be used for the same purpose ie to write arbitrary files.
Technical context
This is another vulnerability which impacts the downstream user. By constructing a pickle that user distutils.fileutil.writefile, an attacker can overwrite critical system files (like .ssh/authorizedkeys, web server configurations, or source code) to achieve DoS or escalate to RCE.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- Security advisory ↗
- VulnCheck Advisory: picklescan - Arbitrary File Writing via distutils Module Bypass ↗
Record history
Published Jun 17, 2026 · Last refreshed Nov 3, 2026