CVE-2025-71375 picklescan - Undetected Remote Code Execution via _operator.methodcaller
Attackers can bypass picklescan detection using _operator.methodcaller to execute arbitrary code via malicious pickle files.
- 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-2025-71375?
CVE-2025-71375 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 0.0.34 fails to detect the _operator.methodcaller built-in function when scanning pickle files for malicious code. Attackers can craft malicious pickle payloads using _operator.methodcaller that evade detection and execute arbitrary code when loaded by pickle.load().
Weakness: CWE-502
Which versions are affected by CVE-2025-71375?
2 open source packages ship an affected version, including picklescan.
| Package | Affected | Fixed in |
|---|---|---|
picklescan PyPI | All versions | 0.0.34 |
picklescan PyPI | All versions | 0.0.34 |
How do I fix CVE-2025-71375?
Upgrade picklescan to 0.0.34 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-71375 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71375 exists.
Sources
Also known as GHSA-955r-x9j8-7rhh, GHSA-xgj3-g5r2-m8rf.