Picklescan - Arbitrary Code Execution via numpy.f2py.crackfortran._eval_length Gadget
Priority HIGH 68CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
Picklescan before 0.0.33 fails to detect the numpy.f2py.crackfortran._eval_length gadget in pickle __reduce__ methods, allowing arbitrary code execution. Attackers can craft malicious pickle files that execute arbitrary Python code when loaded by victims who trust Picklescan's safety validation.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00381 32nd percentileScored 2026-11-07
Fix Fixed Picklescan (Picklescan): 0.0.33picklescan (PyPI): 0.0.33
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
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 0.0.33 | 0.0.33 | Patch available | CNA |
| — | picklescan (PyPI) | before 0.0.33 | 0.0.33 | Patch available | GHSA-6556-fwc2-fg2p |
- Picklescan Vendorpicklescan Affected before 0.0.33 Fixed in 0.0.33 Patch available CNA
- picklescan (PyPI) Vendor— Affected before 0.0.33 Fixed in 0.0.33 Patch available GHSA-6556-fwc2-fg2p
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* | — | — | picklescan |
- cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* Versions — — ·picklescan
Remediation
- Fix · CNA Picklescan (Picklescan) Fixed in 0.0.33
- Fix · GHSA-6556-fwc2-fg2p picklescan (PyPI) Fixed in 0.0.33 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-71339
- 2026-10-03 Alias added: GHSA-6556-fwc2-fg2p
References
Advisory 3
Other 6
- https://github.com/mmaitre314/picklescan/pull/53
- https://github.com/mmaitre314/picklescan/commit/70c1c6c31beb6baaf52c8db1b6c3c0e84a6f9dab
- https://github.com/mmaitre314/picklescan
- https://github.com/mmaitre314/picklescan/releases/tag/v0.0.33
- https://github.com/pypa/advisory-database/tree/main/vulns/picklescan/PYSEC-2026-1783.yaml
- https://pypi.org/project/picklescan
More picklescan vulnerabilities
- TI-2026-03009 picklescan - Universal Blocklist Bypass via pkgutil.resolve_name CVSS 4.0CRITICAL 10.0
- TI-2026-40680 picklescan - Remote Code Execution via Unblocked Standard Library Modules CVSS 4.0CRITICAL 9.3
- TI-2026-38870 picklescan - Arbitrary Code Execution via Obfuscated eval Call CVSS 4.0CRITICAL 9.3
- TI-2026-38869 picklescan - Arbitrary Code Execution via profile.run() Blocklist Bypass CVSS 4.0CRITICAL 9.3
- TI-2025-43446 picklescan - Detection Bypass via STACK_GLOBAL Opcode Parsing Logic Flaw CVSS 4.0CRITICAL 9.3
- TI-2025-43444 picklescan - Remote Code Execution via Unblocked ctypes Module CVSS 4.0CRITICAL 9.3
Sources
- CVE-2025-71339 · CVE Program
- CVE-2025-71339 · NVD
- FIRST EPSS
- GHSA-6556-fwc2-fg2p · 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