picklescan - Arbitrary File Creation via logging.FileHandler Deserialization
Priority HIGH 70CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payloads to bypass RCE blocklists and create lock files or other filesystem artifacts, potentially causing denial of service or application disruption.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00443 38th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed picklescan (picklescan): 1.0.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| picklescan | picklescan | before 1.0.1 | 1.0.1 | Patch available | CNA |
- picklescan Vendorpicklescan Affected before 1.0.1 Fixed in 1.0.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* | before 1.0.1 | Vulnerable | picklescan |
- cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* Versions before 1.0.1 Vulnerable ·picklescan
Remediation
- Fix · CNA picklescan (picklescan) Fixed in 1.0.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-56304
- 2026-10-03 Alias added: GHSA-hqgf-f82p-fjh7
References
Exploit 1
More Picklescan vulnerabilities
- TI-2025-09324 PickleScan Bypasses Unsafe Globals Check Using Submodule Imports CVSS 4.0CRITICAL 9.3
- TI-2025-09323 PickleScan Security Bypass via Bad CRC in ZIP Archive CVSS 4.0CRITICAL 9.3
- TI-2025-09322 PickleScan Security Bypass Using Misleading File Extension CVSS 4.0CRITICAL 9.3
- TI-2025-43498 picklescan - Remote Code Execution via Undetected cProfile.runctx in Pickle Files CVSS 4.0HIGH 7.6
- TI-2025-43477 picklescan - Arbitrary Code Execution via Undetected idlelib.pyshell.ModifiedInterpreter.runcommand CVSS 4.0HIGH 7.6
- TI-2025-43468 picklescan - Arbitrary Code Execution via torch.utils._config_module.load_config Bypass CVSS 4.0HIGH 7.6
Sources
- CVE-2026-56304 · CVE Program
- CVE-2026-56304 · NVD
- FIRST EPSS
- GHSA-hqgf-f82p-fjh7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences