CVE-2025-71365 picklescan - Arbitrary Code Execution via numpy.f2py.crackfortran.myeval Detection Bypass
Attackers can bypass picklescan detection to execute arbitrary code via malicious pickle files using numpy.f2py.crackfortran.myeval.
- 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
- Available
What is CVE-2025-71365?
CVE-2025-71365 is a high-severity unsafe deserialization vulnerability in picklescan, published on 23 Jun 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 that invoke numpy.f2py.crackfortran.myeval function through the reduce method. Attackers can craft malicious pickle files embedding arbitrary code that evades picklescan detection and executes remote code when loaded.
Weakness: CWE-502
Which versions are affected by CVE-2025-71365?
3 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 |
picklescan PyPI | All versions | 0.0.33 |
How do I fix CVE-2025-71365?
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-2025-71365 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71365 exists.
Sources
Also known as GHSA-3329-ghmp-jmv5, PYSEC-2026-4131.