pypdf is a free and open-source pure-python PDF library

Why it is Yellow

• CVSS 7.1 high
• Remotely exploitable without logging in
• On your watchlist: python

References

• https://github.com/py-pdf/pypdf/commit/b891fef37000cd86baa6e9848a3387d080b3b03e
• https://github.com/py-pdf/pypdf/pull/4251
• https://github.com/py-pdf/pypdf/releases/tag/6.21.3
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-42gh-23hr-vphw

Original description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.