CVE-2025-71352 picklescan - Remote Code Execution via Undetected trace.Trace.runctx in Pickle Files
Attackers can execute arbitrary code by crafting malicious pickle files that bypass picklescan detection using trace.Trace.runctx.
- 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-2025-71352?
CVE-2025-71352 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 0.0.29 fails to detect the built-in Python trace.Trace.runctx function when used in pickle file reduce methods, allowing attackers to execute arbitrary code. Remote attackers can craft malicious pickle files with trace.Trace.runctx payloads that bypass picklescan detection and execute code upon pickle.load() invocation.
Weakness: CWE-693
Which versions are affected by CVE-2025-71352?
2 open source packages ship an affected version, including picklescan.
| Package | Affected | Fixed in |
|---|---|---|
picklescan PyPI | All versions | 0.0.29 |
picklescan PyPI | All versions | 0.0.29 |
How do I fix CVE-2025-71352?
Upgrade picklescan to 0.0.29 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-71352 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71352 exists.
Sources
Also known as GHSA-g344-hcph-8vgg, GHSA-rf4j-9c72-qfw6.