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Vulnerability record · CVE-2026-56304 · published 20 June 2026

CVE-2026-56304: Mmaitre314 picklescan deserialization of untrusted data vulnerability

MMmaitre314 · Picklescan

picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payloads to bypass RCE blocklists and create lock files or other filesystem artifacts, potentially causing denial of service or application disruption.

6.9 CVSS 4.0 Medium EPSS 0.44% · top 64.0% CWE-502 · Deserialization of untrusted data
6.9CVSS 4.0 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
24 Jun 2026Last modified by NVD

Description

picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payloads to bypass RCE blocklists and create lock files or other filesystem artifacts, potentially causing denial of service or application disruption.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r ExploitVendor Advisory
https://www.vulncheck.com/advisories/picklescan-arbitrary-file-creation-via-logging-filehandler-deserialization Third Party Advisory
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-56304), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.