What is CVE-2026-56315?

CVE-2026-56315 is a critical-severity vulnerability in Picklescan, classified under Incomplete List of Disallowed Inputs. CVSS score: 9.8/10. Published 2026-06-23.

How severe is CVE-2026-56315?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Picklescan

CVE-2026-56315

picklescan before 1.0.4 fails to block at least seven Python standard library modules (including uuid, _osx_support, _aix_support, _pyrepl.pager, and imaplib) exposing eight functions that provide direct arbitrary command execution. Attackers can craft malicious pickle files importing these unblocked modules to achieve remote code execution while bypassing picklescan's safety validation entirely.

EPSS: 0.011 (64.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Picklescan — versions 0, 1.0.4

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56315?: CVE-2026-56315 is a critical-severity vulnerability in Picklescan, classified under Incomplete List of Disallowed Inputs. CVSS score: 9.8/10. Published 2026-06-23.
How severe is CVE-2026-56315?: Critical severity. CVSS v3 base score is 9.8 out of 10.