PT-2026-2244

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.6.0 Description pypdf is a free and open-source pure-python PDF library. Versions prior to 6.6.0 are susceptible to potential long runtimes when processing PDF files missing the /Root object but containing a large /Si...

Denial-of-service (DoS)

pypdf is vulnerable to a Denial-of-service DoS. The vulnerability is due to improper handling of inline images using the DCTDecode filter during PDF content stream parsing, which allows an attacker to craft a malicious PDF that triggers an infinite loop and causes CPU exhaustion...

Denial-of-service (DoS)

pypdf is vulnerable to Denial-of-service DoS. The vulnerability is due to improper handling of the LZWDecode filter while parsing a PDF page content stream, which allows an attacker to craft a malicious PDF that triggers excessive memory usage...

Uncontrolled Memory Allocation

pypdf is vulnerable to uncontrolled memory allocation. The vulnerability is due to improper handling of LZWDecode streams, which allows an attacker to craft a malicious PDF that causes excessive memory consumption up to 1 GB per stream during content parsing...

Linux Distros Unpatched Vulnerability : CVE-2025-66019

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 leads to a memory...

SUSE CVE-2025-66019

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

CVE-2025-66019

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

pypdf 安全漏洞

pypdf is py-pdf open source a free open source pure python PDF library . It is able to split, merge, crop and convert pages of a PDF file. pypdf versions prior to 6.4.0 has a security vulnerability , the vulnerability stems from the LZWDecode filter parsing PDF content streams may lead to excessi...

CVE-2025-66019 pypdf manipulated LZWDecode streams can exhaust RAM

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

CVE-2025-66019

CVE-2025-66019 affects the Python PDF library pypdf up to version 6.3.x. Reporter data from multiple sources state that parsing a page content stream using the LZWDecode filter can cause memory usage to balloon to as much as 1 GB per stream, leading to potential denial of service on affected pars...

CVE-2025-66019 pypdf manipulated LZWDecode streams can exhaust RAM

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

EUVD-2025-199665

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

CVE-2025-66019

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

CVE-2025-66019 pypdf manipulated LZWDecode streams can exhaust RAM

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 leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

01os (>=0.0.5 <=0.0.13), 3m (>=0.1.0 <=0.1.3) +2532 more potentially affected by CVE-2025-66019 via pypdf (>=3.10.0 <=6.3.0)

pypdf PYPI version =3.10.0, =0.0.5, =0.1.0, =0.0.1, =0.2.0, =0.4.0, =0.3.0, =0.3.0, =0.1.1, =0.1.0, =0.0.2, =0.2.0, =1.2.27, =3.0.145 and more Source cves: CVE-2025-66019 Source advisory: OSV:GHSA-M449-CWJH-6PW7...

Improper Handling of Highly Compressed Data (Data Amplification)

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 Handling of Highly Compressed Data Data Amplification via the LZWDecode process. An attacker can exhaust system memory by...

pypdf's LZWDecode streams be manipulated to exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This is a follow up to GHSA-jfx9-29x2-rv3j to align the default limit with the one for zlib. Patche...

01os (>=0.0.5 <=0.0.13), 3m (>=0.1.0 <=0.1.3) +2069 more potentially affected by CVE-2025-66019 via pypdf (>=6.0.0 <=6.3.0)

pypdf PYPI version =6.0.0, =0.0.5, =0.1.0, =0.0.1, =0.2.0, =0.4.0, =0.3.0, =0.3.0, =0.1.1, =0.1.0, =0.0.2, =0.2.0, =1.2.27, =0.1.0, =0.6.0, =0.7.3 and more Source cves: CVE-2025-66019 Source advisory: SNYK:PYTHON-PYPDF-14105065...

GHSA-M449-CWJH-6PW7 pypdf's LZWDecode streams be manipulated to exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This is a follow up to GHSA-jfx9-29x2-rv3j to align the default limit with the one for zlib. Patche...

Astra Linux - уязвимость в pypdf2

pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In version 2.10.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This infinite loop blocks the current process and can utilize a single co...