CVE-2025-71355 Picklescan - Arbitrary Code Execution via Unsafe Numpy Function Detection Bypass
Attackers can bypass Picklescan's static analysis to execute arbitrary code via malicious pickle files using unsafe Numpy functions.
- 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-2025-71355?
CVE-2025-71355 is a high-severity unsafe deserialization vulnerability in Picklescan, published on 30 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 0.0.25 fails to detect unsafe global functions in the Numpy library, allowing attackers to bypass static analysis and execute arbitrary code during deserialization. Attackers can craft malicious pickle files using numpy.testing._private.utils.runstring within the reduce method to import dangerous libraries like os and execute arbitrary OS commands when the pickle file is loaded.
Weakness: CWE-184
Which versions are affected by CVE-2025-71355?
2 open source packages ship an affected version, including picklescan.
| Package | Affected | Fixed in |
|---|---|---|
picklescan PyPI | All versions | 0.0.25 |
picklescan PyPI | All versions | 0.0.25 |
How do I fix CVE-2025-71355?
Upgrade picklescan to 0.0.25 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-71355 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71355 exists.
Sources
Also known as GHSA-7jm4-f7vj-6pcc, GHSA-fj43-3qmq-673f.