---
id: CVE-2026-102995
title: pypdf is a free and open-source pure-python PDF library
summary: >-
  pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a
  crafted PDF can place unusually large source-code or destination-string tokens
  in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode
  and re…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
vendor: pypdf_project
product: pypdf
affected:
  - pypdf < 6.18.1
patched:
  - pypdf 6.18.1
published: '2026-09-30'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T15:23:15.717'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102995'
references:
  - url: >-
      https://github.com/py-pdf/pypdf/commit/319d0b823ce2c311a2435e9fd93c13994d32bb51
    label: security-advisories@github.com
  - url: 'https://github.com/py-pdf/pypdf/pull/4071'
    label: security-advisories@github.com
  - url: 'https://github.com/py-pdf/pypdf/releases/tag/6.18.1'
    label: security-advisories@github.com
  - url: 'https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3h-c4fm-7vvf'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102995.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-102995'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2544273'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-102995'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102995'
  - url: 'https://github.com/advisories/GHSA-fp3h-c4fm-7vvf'
  - url: 'https://github.com/py-pdf/pypdf'
  - url: 'https://pypi.org/project/pypdf'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - ghsa
  - pip
  - osv
  - score-dispute
epss: 0.0034
epssPercentile: 0.27373
aliases:
  - GHSA-fp3h-c4fm-7vvf
  - PYSEC-2026-4154
ecosystem: pip
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-01T18:50:23.022437Z'
scores:
  nvd: 7.5
  cna: 8.7
  vendor: 6.5
ingestedAt: '2026-09-30T21:25:07.838Z'
---

## Overview

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. This issue is fixed in version 6.18.1.

## Affected

- `pypdf < 6.18.1`

## Remediation

Upgrade past the affected range:

- `pypdf 6.18.1`

## Package advisory (CVE-2026-102995)

Affected packages:

- `pypdf < 6.18.1`

Patched in:

- `pypdf 6.18.1`

Source: https://github.com/advisories/GHSA-fp3h-c4fm-7vvf

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Ansible Automation Orchestrator 2026, Lightspeed Core, OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI), … · no fix planned: Red Hat Ansible Automation Platform 2, Red Hat Quay 3, Ansible Automation Orchestrator 2026, Lightspeed Core, … · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102995.json)