# CVE-2025-71351: picklescan - Remote Code Execution via timeit.timeit() Detection Bypass

Status: published. Published: 2026-06-21. Updated: 2026-11-08.

picklescan before 0.0.25 fails to detect malicious pickle files that use timeit.timeit() in the __reduce__ method, allowing remote code execution. Attackers can craft pickle files that import dangerous libraries like os and execute arbitrary system commands, which evade picklescan detection and execute when pickle.load() is called.

## Remediation

- fix: picklescan (PyPI): OSV reports a fixed version 0.0.25. Check the advisory for supported release branches. (source: OSV GHSA-v7x6-rv5q-mhwc) — https://github.com/advisories/GHSA-v7x6-rv5q-mhwc

## Affected products and versions

- picklescan / picklescan (picklescan): ≥ 0; < 0.0.25 (affected, semver); 0.0.25 (unaffected, semver). Source: CNA: VulnCheck
-  / picklescan (picklescan): 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); 0.0.3 (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 0.0.25. Source: OSV GHSA-v7x6-rv5q-mhwc

## Severity and prioritization

- CVSS 4.0: 7.6 (high); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.55% as of 2026-11-08; percentile 46.41%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-184

## Exploit evidence

- exploit: https://github.com/mmaitre314/picklescan/security/advisories/GHSA-v7x6-rv5q-mhwc (ADP: CISA-ADP)

## References

- https://github.com/mmaitre314/picklescan/security/advisories/GHSA-v7x6-rv5q-mhwc (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-timeit-timeit-detection-bypass (CNA: VulnCheck; third-party-advisory)

- https://github.com/mmaitre314/picklescan/security/advisories/GHSA-v7x6-rv5q-mhwc (ADP: CISA-ADP; exploit)

- https://github.com/advisories/GHSA-v7x6-rv5q-mhwc (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-v7x6-rv5q-mhwc (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2025-71351; retrieved 2026-11-08; source updated 2026-11-08

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-v7x6-rv5q-mhwc; retrieved 2026-11-08; source updated 2026-10-01

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-71351; retrieved 2026-11-08; source updated Not reported

Revision: 3a55f0c611f4ef2677ef6a9bc57d989cada289dab9b3fa47918c2bef1ae9ffa5

Canonical: https://y2.dev/cve/CVE-2025-71351

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.