https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 28 Sep 2026 18:54:27 +0000 https://vulnerability.circl.lu/vuln/cve-2025-66019 <p><strong>Affected:</strong> py-pdf pypdf</p> <p>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 patched in version 6.4.0.</p> <p><strong>Affected:</strong> py-pdf pypdf</p> <p>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 patched in version 6.4.0.</p> https://vulnerability.circl.lu/vuln/cve-2025-66019 https://vulnerability.circl.lu/vuln/ghsa-m449-cwjh-6pw7 <p><strong>Affected:</strong> PyPI: pypdf</p> <p>### Impact</p> <p>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.</p> <p>This is a follow up to [GHSA-jfx9-29x2-rv3j](https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j) to align the default limit with the one for *zlib*.</p> <p>### Patches This has been fixed in [pypdf==6.4.0](https://github.com/py-pdf/pypdf/releases/tag/6.4.0).</p> <p>### Workarounds If users cannot upgrade yet, use the line below to overwrite the default in their code:</p> <p>```python pypdf.filters.LZW_MAX_OUTPUT_LENGTH = 75_000_000 ```</p> <p><strong>Affected:</strong> PyPI: pypdf</p> <p>### Impact</p> <p>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.</p> <p>This is a follow up to [GHSA-jfx9-29x2-rv3j](https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j) to align the default limit with the one for *zlib*.</p> <p>### Patches This has been fixed in [pypdf==6.4.0](https://github.com/py-pdf/pypdf/releases/tag/6.4.0).</p> <p>### Workarounds If users cannot upgrade yet, use the line below to overwrite the default in their code:</p> <p>```python pypdf.filters.LZW_MAX_OUTPUT_LENGTH = 75_000_000 ```</p> https://vulnerability.circl.lu/vuln/ghsa-m449-cwjh-6pw7 https://vulnerability.circl.lu/vuln/pysec-2026-1832 <p><strong>Affected:</strong> PyPI: pypdf</p> <p>### Impact</p> <p>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.</p> <p>This is a follow up to [GHSA-jfx9-29x2-rv3j](https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j) to align the default limit with the one for *zlib*.</p> <p>### Patches This has been fixed in [pypdf==6.4.0](https://github.com/py-pdf/pypdf/releases/tag/6.4.0).</p> <p>### Workarounds If users cannot upgrade yet, use the line below to overwrite the default in their code:</p> <p>```python pypdf.filters.LZW_MAX_OUTPUT_LENGTH = 75_000_000 ```</p> <p><strong>Affected:</strong> PyPI: pypdf</p> <p>### Impact</p> <p>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.</p> <p>This is a follow up to [GHSA-jfx9-29x2-rv3j](https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j) to align the default limit with the one for *zlib*.</p> <p>### Patches This has been fixed in [pypdf==6.4.0](https://github.com/py-pdf/pypdf/releases/tag/6.4.0).</p> <p>### Workarounds If users cannot upgrade yet, use the line below to overwrite the default in their code:</p> <p>```python pypdf.filters.LZW_MAX_OUTPUT_LENGTH = 75_000_000 ```</p> https://vulnerability.circl.lu/vuln/pysec-2026-1832