CVE-2025-71364 picklescan - Arbitrary Code Execution via Undetected asyncio.unix_events._UnixSubprocessTransport._start
Attackers can execute arbitrary code by crafting malicious pickle files that evade detection by the picklescan library.
- 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-2025-71364?
CVE-2025-71364 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 0.0.30 fails to detect the asyncio.unix_events._UnixSubprocessTransport._start function in pickle reduce methods, allowing remote code execution. Attackers can craft malicious pickle files embedding this built-in function that evade detection but execute arbitrary commands when loaded.
Weakness: CWE-502
Which versions are affected by CVE-2025-71364?
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-2025-71364?
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-2025-71364 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71364 exists.
Sources
Also known as GHSA-cf85-jm34-89c3, GHSA-q77w-mwjj-7mqx.