Vulnerability in Picklescan
CVE-2026-3490
picklescan before 1.0.4 fails to block pkgutil.resolve_name, allowing attackers to bypass the entire blocklist by resolving any dangerous function through indirect REDUCE calls. Remote attackers can invoke any blocked function such as os.system, builtins.exec, or subprocess.call to achieve remote code execution.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (57.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.008 · change: -0.001
Affected products
- Picklescan — versions 0, 1.0.4
Weakness classification (CWE)
References
- github.com/mmaitre314/picklescan/security/advisories/GHSA-vvpj-8cmc-gx39 (vendor-advisory)
- www.vulncheck.com/advisories/picklescan-universal-blocklist-bypass-via-pkgutil-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-3490?
- CVE-2026-3490 is a critical-severity vulnerability in Picklescan, classified under CWE-183. CVSS score: 10.0/10. Published 2026-06-17.
- How severe is CVE-2026-3490?
- Critical severity. CVSS v3 base score is 10.0 out of 10.