CVE-2025-71320

picklescan - Remote Code Execution via Incomplete Disallowed Inputs

publishedCWE-184

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.

Technical severity9.3 criticalCVSS 4.0 · CNA: VulnCheck

Published2026-06-17Source updated 2026-11-08

Collected2026-11-083 attributed sources

Fixes and workarounds

Fix

picklescan (PyPI): OSV reports a fixed version 0.0.33. Check the advisory for supported release branches.

Source: OSV GHSA-84r2-jw7c-4r5q

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
picklescan picklescan `picklescan` pypi	≥ 0; < 0.0.33 (affected, semver) 0.0.33 (unaffected, semver) Other versions: unaffected	CNA: VulnCheck
picklescan `picklescan` PyPI	0.0.1 (affected, PyPI) 0.0.10 (affected, PyPI) 0.0.11 (affected, PyPI) 0.0.12 (affected, PyPI) 0.0.13 (affected, PyPI) 0.0.14 (affected, PyPI) 0.0.15 (affected, PyPI) 0.0.16 (affected, PyPI) 0.0.17 (affected, PyPI) 0.0.18 (affected, PyPI) 0.0.19 (affected, PyPI) 0.0.2 (affected, PyPI) 0.0.20 (affected, PyPI) 0.0.21 (affected, PyPI) 0.0.22 (affected, PyPI) 0.0.23 (affected, PyPI) 0.0.24 (affected, PyPI) 0.0.25 (affected, PyPI) 0.0.26 (affected, PyPI) 0.0.27 (affected, PyPI) 0.0.28 (affected, PyPI) 0.0.29 (affected, PyPI) 0.0.3 (affected, PyPI) 0.0.30 (affected, PyPI) 0.0.31 (affected, PyPI) 0.0.32 (affected, PyPI) 0.0.4 (affected, PyPI) 0.0.5 (affected, PyPI) 0.0.6 (affected, PyPI) 0.0.7 (affected, PyPI) 0.0.8 (affected, PyPI) 0.0.9 (affected, PyPI) Ecosystem version events: introduced 0; fixed 0.0.33 Source events (ECOSYSTEM) `[ { "introduced": "0" }, { "fixed": "0.0.33" } ]` Other versions: unaffected	OSV GHSA-84r2-jw7c-4r5q

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 9.3 critical	`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`	CNA: VulnCheck
3.1 / 9.8 critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`	CNA: VulnCheck

Exploit evidence

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-84r2-jw7c-4r5q
exploit · ADP: CISA-ADP

References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-84r2-jw7c-4r5qCNA: VulnCheck · vendor-advisory
https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-incomplete-disallowed-inputsCNA: VulnCheck · third-party-advisory
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-84r2-jw7c-4r5qADP: CISA-ADP · exploit
https://github.com/advisories/GHSA-84r2-jw7c-4r5qOSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-84r2-jw7c-4r5qOSV / GitHub Security Advisories · osv

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