CVE-2026-40260

pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has...

CVE-2026-40260 pypdf: Manipulated XMP metadata entity declarations can exhaust RAM

pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has...

pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using /FlateDecode with large size values. Patches This has been fixed in pypdf==6.10.2. Workarounds If you cannot upgrade yet, consider applying the changes fro...

Memory Allocation with Excessive Size Value

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 Memory Allocation with Excessive Size Value in the FlateDecode image processing when handling images with large size values. An...

GHSA-X284-J5P8-9C5P pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using /FlateDecode with large size values. Patches This has been fixed in pypdf==6.10.2. Workarounds If you cannot upgrade yet, consider applying the changes fro...

pypdf: Possible long runtimes for wrong size values in incremental mode

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer /Size value in incremental mode. Patches This has been fixed in pypdf==6.10.2. Workarounds If you cannot upgrade yet, consider applying the changes from PR...

Excessive Iteration

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 Excessive Iteration in the incremental mode for PDF processing. An attacker can cause excessive resource consumption and...

GHSA-7GW9-CF7V-778F pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using /FlateDecode with a /Predictor unequal 1 and large predictor parameters. Patches This has been fixed in pypdf==6.10.2. Workarounds If you cannot...

pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using /FlateDecode with a /Predictor unequal 1 and large predictor parameters. Patches This has been fixed in pypdf==6.10.2. Workarounds If you cannot...

PT-2026-34567

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.10.2 Description A flaw in the pypdf library allows an attacker to craft a PDF file that causes RAM exhaustion, leading to a denial of service. This occurs when accessing an image using the /FlateDecode filter with...

PT-2026-34565

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.10.2 Description A flaw in the pure-python PDF library allows an attacker to craft a PDF that leads to RAM exhaustion. This occurs when accessing a stream compressed using '/FlateDecode' with a /Predictor unequal to 1...

PT-2026-34566

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.10.2 Description A flaw in the pure-python PDF library allows an attacker to craft a PDF that causes long runtimes. This occurs when loading a PDF in incremental mode that contains a large /Size value in the trailer...

GHSA-JJ6C-8H6C-HPPX pypdf has long runtimes for wrong size values in cross-reference and object streams

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large /Size values or object streams with wrong large /N values. Patches This has been fixed in pypdf==6.10.1. Workarounds If you cannot upgrade yet,...

Improper Validation of Specified Quantity in Input

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 Improper Validation of Specified Quantity in Input through the PdfReader object stream and xref stream parsers in pypdf/reader.py...

PT-2026-34562

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.10.1 Description A flaw in the pure-python PDF library allows an attacker to craft a PDF that results in long runtimes. This is achieved by using cross-reference streams with incorrect large /Size values or object...

XML Entity Expansion

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 XML Entity Expansion when parsing XMP metadata. An attacker can cause excessive memory consumption with excessive DOCTYPE entity...

GHSA-3CRG-W4F6-42MX pypdf: Manipulated XMP metadata entity declarations can exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. Patches This has been fixed in pypdf==6.10.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR 3724...

pypdf: Manipulated XMP metadata entity declarations can exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. Patches This has been fixed in pypdf==6.10.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR 3724...

Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in pypdf-6.3.0-py3-none-any.whl

Summary IBM Watson Discovery Cartridge affected by vulnerability in pypdf-6.3.0-py3-none-any.whl Vulnerability Details CVEID:CVE-2025-66019 DESCRIPTION: pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which...

Security Bulletin: Investigation Assistant App for IBM QRadar SIEM is vulnerable to using components with known vulnerabilities

Summary The product includes vulnerable components e.g., framework libraries that could be identified and exploited with automated tools. Investigation Assistant App for IBM QRadar SIEM has addressed the applicable CVEs in an update. Vulnerability Details CVEID:CVE-2026-27628 DESCRIPTION: pypdf i...