CVE-2026-82398 — Vulnerability intelligence
py-pdf — pypdf
Published:
- CVSS
- 6.9
- 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 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/_utils.py function read_until_whitespace reads a stream containing a long run of bytes without whitespace. The function repeatedly performs immutable bytes concatenation in a one-byte loop, causing quadratic processing cost for the long non-whitespace input. This issue is fixed in version 6.15.0.