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/ea4ac663133f1b3de1d7a8f2e6fa239802fde79e
• https://github.com/py-pdf/pypdf/pull/4290
• https://github.com/py-pdf/pypdf/releases/tag/6.21.4
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-cggf-277g-3q54

Original description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4.