SEPTEMBER 17, 2026
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Case File

CVE-2026-84311

MEDIUM · CVSS 4.8 EPSS 0.14% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The pypdf library prior to version 6.16.1 is vulnerable to a denial-of-service attack due to improper handling of crafted PDF files, which can lead to excessive memory consumption and prolonged runtimes. This vulnerability can be exploited by attackers to create PDFs that cause significant performance degradation in applications using the library. Organizations utilizing pypdf should prioritize updating to version 6.16.1 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-84311
Severity
MEDIUM
CVSS
4.8
EPSS
0.14%

Original NVD Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.