Deserialization in Picklescan
CVE-2025-71375
picklescan before 0.0.34 fails to detect the _operator.methodcaller built-in function when scanning pickle files for malicious code. Attackers can craft malicious pickle payloads using _operator.methodcaller that evade detection and execute arbitrary code when loaded by pickle.load().
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: 0.005 (37.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.001
Affected products
- Picklescan — versions 0, 0.0.34
Weakness classification (CWE)
References
- github.com/mmaitre314/picklescan/security/advisories/GHSA-955r-x9j8-7rhh (vendor-advisory)
- www.vulncheck.com/advisories/picklescan-undetected-remote-code-execution-via-op… (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71375?
- CVE-2025-71375 is a high-severity vulnerability in Picklescan, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-07-04.
- How severe is CVE-2025-71375?
- High severity. CVSS v3 base score is 8.1 out of 10.