CVE-2026-84309 — pypdf: Possible infinite loop for TreeObject.insert_child
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeOb…
Published: 2026-09-01 · CVSS: 6.9 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to follow /Next links indefinitely when a writing code path inserts a child, producing an infinite loop. This issue is fixed in version 6.16.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7