CVE-2026-71852

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font /W width ranges or excessive width entries during text extraction. This issue is fixed in 6.15.0.

References

• https://github.com/py-pdf/pypdf/commit/51cb6acf9e8a35b77e90b4d87d28fe3e1416d7d7
• https://github.com/py-pdf/pypdf/pull/3946
• https://github.com/py-pdf/pypdf/releases/tag/6.15.0
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-fwg2-594c-jp42