---
id: CVE-2026-59935
aliases:
  - GHSA-g867-7843-wf8q
  - PYSEC-2026-3613
title: >-
  pypdf: Possible infinite loop for not terminated inline images (ASCII85 and
  ASCIIHex filter)
summary: >-
  pypdf: Possible infinite loop for not terminated inline images (ASCII85 and
  ASCIIHex filter)
severity: high
vendor: pypdf
product: pypdf
ecosystem: pip
affected:
  - pypdf < 6.14.2
patched:
  - pypdf 6.14.2
published: '2026-07-23'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:51.957724392Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-g867-7843-wf8q'
references:
  - url: 'https://github.com/py-pdf/pypdf/security/advisories/GHSA-g867-7843-wf8q'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59935'
  - url: 'https://github.com/py-pdf/pypdf/pull/3892'
  - url: >-
      https://github.com/py-pdf/pypdf/commit/5a33a46416aa1ae6c025ff90a3cca57631fdafd2
  - url: 'https://github.com/py-pdf/pypdf'
  - url: 'https://github.com/py-pdf/pypdf/releases/tag/6.14.2'
  - url: 'https://github.com/advisories/GHSA-g867-7843-wf8q'
tags:
  - osv
  - pip
  - ghsa
epss: 0.0062
epssPercentile: 0.47399
cwe:
  - CWE-835
ingestedAt: '2026-07-23T17:18:58.493Z'
---

## Overview

### Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page with a not terminated inline image, as done when extracting the page text for example. It only affects the ASCII85 and ASCIIHex filters.

### Patches

This has been fixed in [pypdf==6.14.2](https://github.com/py-pdf/pypdf/releases/tag/6.14.2).

### Workarounds

If you cannot upgrade yet, consider applying the changes from PR [#3892](https://github.com/py-pdf/pypdf/pull/3892).

## Affected packages

- `pypdf < 6.14.2`

## Remediation

Upgrade to a patched release:

- `pypdf 6.14.2`