CVE-2026-84311 — Vulnerability intelligence
py-pdf — pypdf
Published:
- CVSS
- 4.8
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.