CVE-2026-53872Public exploitNetwork attack vector

File disclosure via unblocked standard-library globals

Published Jun 17, 2026 · Updated Jun 17, 2026

Path traversal in Matthieu Maitre picklescan before 0.0.35 allows remote attackers to read server files through crafted pickle data. During pickle processing, the scanner's RCE-focused global blocklist permits io.FileIO to open a chosen local path and urllib.request.urlopen to stream the resulting bytes to an attacker-controlled URL. Reachability requires an untrusted pickle to be scanned; the demonstrated chain discloses readable local files and issues an outbound request without arbitrary code execution.

CVSS severity8.7
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Matthieu Maitre picklescan before 0.0.35 allows remote attackers to read server files through crafted pickle data. During pickle processing, the scanner's RCE-focused global blocklist permits io.FileIO to open a chosen local path and urllib.request.urlopen to stream the resulting bytes to an attacker-controlled URL. Reachability requires an untrusted pickle to be scanned; the demonstrated chain discloses readable local files and issues an outbound request without arbitrary code execution.

The record

CVE
CVE-2026-53872
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
Matthieu Maitre
Product
picklescan
Classifications
CWE-22, CWE-918, T1005, T1048
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.0.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Matthieu Maitre · picklescanversion=0 <0.0.35

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-918Server-Side Request Forgery (SSRF)
T1005Data from Local System
T1048Exfiltration Over Alternative Protocol

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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