CVE-2025-70559
pdfminer.six before 20251230 contains an insecure deserialization vulnerability in the CMap loading mechanism. The library uses Python pickle to deserialize...
- Published
- Feb 3, 2026
- Updated
- Feb 11, 2026
- Assigning CNA
- mitre
- Evidence observed
- Aug 15, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NLow · next 30 days
- Percentile
- 21.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
pdfminer.six before 20251230 contains an insecure deserialization vulnerability in the CMap loading mechanism. The library uses Python pickle to deserialize CMap cache files without validation. An attacker with the ability to place a malicious pickle file in a location accessible to the application can trigger arbitrary code execution or privilege escalation when the file is loaded by a trusted process. This is caused by an incomplete patch to CVE-2025-64512.
Sources
1- CVE-2025-70559Exploit
Python exploit for CVE-2025-70559 targeting an upload directory bypass/remote code execution; run with LHOST and LPORT to establish a reverse shell.
Responsible use
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