CVE-2026-53872 | picklescan before 0.0.35 contains an unsafe pickle deseriali… | CVSS 7.5 HIGH

Description

picklescan before 0.0.35 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to read arbitrary server files by chaining io.FileIO and urllib.request.urlopen. Attackers can bypass RCE-focused blocklists to exfiltrate sensitive data like /etc/passwd to external servers.

Metadata

CVE ID: CVE-2026-53872
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-10 21:23 UTC
Published: 2026-06-17 15:05 UTC
Last updated: 2026-06-17 17:36 UTC
Primary CWE: CWE-22
Improper Limitation of a Pathname to a Restricted Directory …
Vendor / Product: picklescan / picklescan
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
picklescan	picklescan	—	0 < 0.0.35, 0.0.35

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (2)

GHSA Advisory GHSA-9726-w42j-3qjr https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9726-w42j-3qjr
VulnCheck Advisory: picklescan - Arbitrary File Read via Unsafe Pickle Deserialization https://www.vulncheck.com/advisories/picklescan-arbitrary-file-read-via-unsafe-pickle-deserialization