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Vulnerability record · CVE-2025-71320 · published 17 June 2026

CVE-2025-71320: picklescan before 0.0.33 contains an incomplete deny-list that fails to block pydoc.locate and operator.method…

picklescan before 0.0.33 contains an incomplete deny-list that fails to block pydoc.locate and operator.methodcaller functions, allowing attackers to bypass security checks. Remote attackers can craft malicious pickle files using these unblocked functions to achieve arbitrary code execution when the pickle is deserialized.

9.3 CVSS 4.0 Critical EPSS 0.62% · top 52.2% CWE-184 · CWE-184 Deferred
9.3CVSS 4.0 base score
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

picklescan before 0.0.33 contains an incomplete deny-list that fails to block pydoc.locate and operator.methodcaller functions, allowing attackers to bypass security checks. Remote attackers can craft malicious pickle files using these unblocked functions to achieve arbitrary code execution when the pickle is deserialized.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-84r2-jw7c-4r5q
https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-incomplete-disallowed-inputs
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-84r2-jw7c-4r5q

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Source: NIST National Vulnerability Database (record CVE-2025-71320), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.