GHSA-996Q-PR4M-CVGQ pypdf has a possible infinite loop when processing TreeObject

Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the children of a TreeObject, for example as part of outlines. Patches This has been fixed in pypdf==6.7.1. Workarounds If you cannot upgrade yet, consider applying the changes...

Infinite loop

Overview pypdf is an A pure-python PDF library capable of splitting, merging, cropping, and transforming PDF files Affected versions of this package are vulnerable to Infinite loop in the children function in generic/datastructures.py‎, which fails to return from nodes with cyclic links in a...

pypdf has a possible infinite loop when processing TreeObject

Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the children of a TreeObject, for example as part of outlines. Patches This has been fixed in pypdf==6.7.1. Workarounds If you cannot upgrade yet, consider applying the changes...

PT-2026-21301

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.7.1 Description A crafted PDF file can cause an infinite loop when accessing the children of a TreeObject, such as during outline processing. This issue affects the pypdf library, a free and open-source pure-python PD...

PT-2026-20909

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.7.1 Description pypdf is a free and open-source pure-python PDF library. A crafted PDF file can cause excessive processing time due to a malformed /FlateDecode stream and byte-by-byte decompression. Recommendations...

PT-2026-20908

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.7.1 Description pypdf is a free and open-source pure-python PDF library. An attacker can create a malicious PDF file that causes excessive runtime and memory usage when processed. This occurs when parsing the /ToUnico...

Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in pypdf-6.1.1-py3-none-any.whl

Summary IBM Watson Discovery Cartridge affected by vulnerability in pypdf-6.1.1-py3-none-any.whl Vulnerability Details CVEID:CVE-2025-62707 DESCRIPTION: pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which...

Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in pypdf-5.6.0-py3-none-any.whl

Summary IBM Watson Discovery Cartridge affected by vulnerability in pypdf-5.6.0-py3-none-any.whl Vulnerability Details CVEID:CVE-2025-55197 DESCRIPTION: pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being...

CVE-2026-24688

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

CVE-2026-24688

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

UBUNTU-CVE-2026-24688

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

CVE-2026-24688

CVE-2026-24688 affects the pypdf library (Python). The vulnerability is an infinite loop in outline/bookmark processing that can be triggered by crafting a PDF; versions before 6.6.2 are vulnerable. The issue is fixed in pypdf 6.6.2. If upgrading is not yet possible, apply the changes from PR #36...

CVE-2026-24688 pypdf has possible Infinite Loop when processing outlines/bookmarks

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

CVE-2026-24688

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

EUVD-2026-4753

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

CVE-2026-24688 pypdf has possible Infinite Loop when processing outlines/bookmarks

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

CVE-2026-24688

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

CVE-2026-24688 pypdf has possible Infinite Loop when processing outlines/bookmarks

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects...

Exploit for CVE-2026-24688

CVE-2026-24688 - pypdf - Circular Reference DoS Vulnerability...

pypdf security vulnerability

pypdf is an open-source, free Python library developed by py-pdf. It allows for splitting, merging, cropping, and converting pages within PDF files. Prior to version 6.6.2, pypdf had a security vulnerability due to an infinite loop, which could lead to resource consumption when processing special...