by Kastro
Paper/Archive/CVE-2026-56315

CVE-2026-56315

picklescan picklescan — picklescan - Remote Code Execution via Unblocked Standard Library Modules

EPSS 1%public exploitCVSS 9.8
critical.is priorityof 100
53
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 66.8.668 × 2013.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
picklescan< 1.0.41.0.4CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/mmaitre314/picklescan/security/advisories/GHSA-g38g-8gr9-h9xpwriteupvulncheck.com/advisories/picklescan-remote-code-execution-via-unblocked-standard-library-modules