CVE-2025-71363 picklescan - Arbitrary Code Execution via Undetected cProfile.run in Pickle Deserialization
Attackers can execute arbitrary code by crafting malicious pickle files that bypass picklescan's detection of cProfile.run calls.
- 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-2025-71363?
CVE-2025-71363 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 0.0.30 fails to detect cProfile.run function calls in pickle reduce methods, allowing attackers to execute arbitrary code. Remote attackers can craft malicious pickle files with cProfile.run payloads that bypass picklescan detection and achieve code execution upon deserialization.
Weakness: CWE-502
Which versions are affected by CVE-2025-71363?
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-2025-71363?
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-2025-71363 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71363 exists.
Sources
Also known as GHSA-49gj-c84q-6qm9, GHSA-r9rj-xr26-286v.