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TI-2025-43114 Aliases CVE-2025-70559GHSA-f83h-ghpp-7wcc

pdfminer.six before 20251230 contains an insecure deserialization vulnerability in the…

Priority HIGH 68CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution, Tampering
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-502 and CWE-915.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0032 25th percentileScored 2026-11-07
Fix Fixed pdfminer.six (PyPI): 20251230

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—pdfminer.six (PyPI)before 2025123020251230Patch availableGHSA-f83h-ghpp-7wcc
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • pdfminer.six (PyPI) Vendor— Affected before 20251230 Fixed in 20251230 Patch available GHSA-f83h-ghpp-7wcc

Remediation

  • Fix · GHSA-f83h-ghpp-7wcc pdfminer.six (PyPI) Fixed in 20251230 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-70559
  2. 2026-10-03 Alias added: GHSA-f83h-ghpp-7wcc

References

Advisory 1

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences