Allocation of Resources Without Limits or Throttling in PyPDF - #VU147295
Published: September 7, 2026
Vulnerability identifier: #VU147295
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause excessive memory consumption.
The vulnerability exists due to allocation of resources without limits or throttling in page label retrieval when accessing page labels in a PDF with large Roman numerals. A remote attacker can craft a PDF with large Roman page labels to cause excessive memory consumption.
Affected software
PyPDF
Remediation
Install security update from vendor's website.
PyPDF - update to 6.17.0