CVE-2026-56304
picklescan - Arbitrary File Creation via logging.FileHandler Deserialization
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.
INFO
Published Date :
June 20, 2026, 4:17 p.m.
Last Modified :
June 24, 2026, 7:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update picklescan to the latest version.
- Remove or sanitize user-supplied data before deserialization.
- Review application logging configurations for potential risks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-56304.
| URL | Resource |
|---|---|
| https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r | Exploit Vendor 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 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-56304 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-56304
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-56304 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-56304 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 24, 2026
Action Type Old Value New Value Added Reference https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r Added SSVC {'id': 'CVE-2026-56304', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-24T17:58:36.424315Z'} -
Initial Analysis by [email protected]
Jun. 23, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.1 Added Reference Type VulnCheck: https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r Types: Exploit, Vendor Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/picklescan-arbitrary-file-creation-via-logging-filehandler-deserialization Types: Third Party Advisory -
New CVE Received by [email protected]
Jun. 20, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'picklescan', 'product': 'picklescan', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.0.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '1.0.1', 'versionType': 'semver'}], 'packageURL': 'pkg:pypi/picklescan', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Added CWE CWE-502 Added Reference https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r Added Reference https://www.vulncheck.com/advisories/picklescan-arbitrary-file-creation-via-logging-filehandler-deserialization