CVE-2025-71347 picklescan - Undetected Remote Code Execution via numpy.f2py.crackfortran.param_eval
Attackers can bypass picklescan security checks to execute arbitrary code via malicious pickle files using numpy.f2py.crackfortran.param_eval.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-71347?
CVE-2025-71347 is a high-severity unsafe deserialization vulnerability in picklescan, published on 4 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
picklescan before 0.0.33 fails to detect malicious pickle files using numpy.f2py.crackfortran.param_eval function in reduce methods, allowing attackers to bypass security checks. Remote attackers can embed undetected code in pickle files that executes during deserialization, enabling arbitrary code execution in applications loading untrusted pickle data.
Weakness: CWE-502
Which versions are affected by CVE-2025-71347?
2 open source packages ship an affected version, including picklescan.
| Package | Affected | Fixed in |
|---|---|---|
picklescan PyPI | All versions | 0.0.33 |
picklescan PyPI | All versions | 0.0.33 |
How do I fix CVE-2025-71347?
Upgrade picklescan to 0.0.33 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-71347 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71347 exists.
Sources
Also known as GHSA-cffc-mxrf-mhh4, GHSA-pqxv-q4c6-wh8q.