Deserialization in Picklescan
CVE-2025-71344
picklescan before 0.0.30 (affected versions 0.0.26 and earlier) fails to detect the ensurepip._run_pip built-in function when scanning pickle files, allowing attackers to execute arbitrary code. Malicious pickle files embedding ensurepip._run_pip calls in __reduce__ methods bypass picklescan detection and achieve remote code execution upon pickle.load() invocation.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (48.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Picklescan — versions 0, 0.0.30
Weakness classification (CWE)
References
- github.com/mmaitre314/picklescan/security/advisories/GHSA-xp4f-hrf8-rxw7 (vendor-advisory)
- www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected… (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71344?
- CVE-2025-71344 is a high-severity vulnerability in Picklescan, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-06-22.
- How severe is CVE-2025-71344?
- High severity. CVSS v3 base score is 8.1 out of 10.