CVE-2025-71361 picklescan - Remote Code Execution via Undetected idlelib.calltip.Calltip.fetch_tip
Attackers can execute arbitrary code by crafting pickle files that bypass picklescan's detection of malicious idlelib 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
- Available
What is CVE-2025-71361?
CVE-2025-71361 is a high-severity unsafe deserialization vulnerability in picklescan, published on 24 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 malicious idlelib.calltip.Calltip.fetch_tip calls in pickle files, allowing remote code execution. Attackers can embed undetected payloads in pickle files that execute arbitrary code when loaded via pickle.load().
Weakness: CWE-95
Which versions are affected by CVE-2025-71361?
3 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 |
picklescan PyPI | All versions | 0.0.29 |
How do I fix CVE-2025-71361?
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-2025-71361 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71361 exists.
Sources
Also known as GHSA-8r4j-24qv-fmq9, PYSEC-2026-1786.