GHSA-jfx9-29x2-rv3j

pypdf can exhaust RAM via manipulated LZWDecode streams

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-62708

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.1.3	6.1.3

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. ### Patches This has been fixed in [pypdf==6.1.3](https://github.com/py-pdf/pypdf/releases/tag/6.1.3). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3502](https://github.com/py-pdf/pypdf/pull/3502).

References

External links from the advisory. They lead to third-party sites.

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j web
https://nvd.nist.gov/vuln/detail/CVE-2025-62708 advisory
https://github.com/py-pdf/pypdf/pull/3502 web
https://github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da web
https://github.com/py-pdf/pypdf package
https://github.com/py-pdf/pypdf/releases/tag/6.1.3 web