Vulnerability · Published Jun 17, 2026 · Assigned by VulnCheck
CVE-2026-53872picklescan - Arbitrary File Read via Unsafe Pickle Deserialization
High 7.5
In plain English
A high-severity path traversal in picklescan from picklescan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 56.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | picklescan | 0.0.35 | GHSA-9726-w42j-3qjr |
| PyPI | picklescan | 0.0.35 | PYSEC-2026-1787 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| picklescan | picklescan | 0 – before 0.0.35 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- GHSA Advisory GHSA-9726-w42j-3qjr vendor-advisory
- VulnCheck Advisory: picklescan - Arbitrary File Read via Unsafe Pickle Deserialization third-party-advisory