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CVE-2026-103000

7.5, high

Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.3% higher than 26.4% of scored CVEs
Exploitation
No public evidence
Published
30 Sept 202617 days ago

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF can provide unusually large alphabetical page-label values that cause pypdf/_page_labels.py to generate strings beyond a reasonable page-label length when an application retrieves document page labels, consuming excessive memory and potentially making the application unavailable. This issue is fixed in version 6.19.0.

Details

Vendor
Py-pdf
Product
pypdf
Weakness
CWE-400 (opens in a new tab)
Status
Analyzed
Updated
5 Oct 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 4

Patches and fixes 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Py-pdf CVEs

Every Py-pdf CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-102993 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-102994 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-102995 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-102996 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-102997 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-102998 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-102999 Py-pdf pypdf Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high

Beyond this page

Is CVE-2026-103000 in your network?

This page tells you how dangerous CVE-2026-103000 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-103000 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.