CVE-2026-115580

HighCVSS 7.1/10Last modified Oct 23, 2026

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.

Metrics

CVSS 4.0 7.1/10CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness enumeration

CWE-834

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
py-pdfpypdf< 6.21.2

References

Timeline

Published
Oct 23, 2026
Last modified
Oct 23, 2026
NVD status
Received

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