CVE-2025-71340 picklescan - Remote Code Execution via idlelib.pyshell.ModifiedInterpreter.runcode
Attackers can execute arbitrary code by bypassing picklescan's detection of malicious pickle files using idlelib methods.
- 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-2025-71340?
CVE-2025-71340 is a high-severity unsafe deserialization vulnerability in picklescan, published on 25 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 through 0.0.26 fails to detect malicious pickle files that invoke idlelib.pyshell.ModifiedInterpreter.runcode in __reduce__ methods. Attackers can embed undetected code in pickle files that executes arbitrary commands when the file is loaded via pickle.load(), enabling supply chain attacks on PyTorch models and saved Python objects. This is fixed in version 0.0.30.
Weakness: CWE-502
Which versions are affected by CVE-2025-71340?
2 open source packages ship an affected version, including picklescan.
| Package | Affected | Fixed in |
|---|---|---|
picklescan PyPI | All versions | 0.0.30 |
picklescan PyPI | All versions | 0.0.30 |
How do I fix CVE-2025-71340?
Upgrade picklescan to 0.0.30 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-71340 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71340 exists.
Sources
Also known as GHSA-3gf5-cxq9-w223, GHSA-mq7r-vm99-p7vx.