CVE-2026-102997 — Vulnerability intelligence
py-pdf — pypdf
Published:
- CVSS
- 8.7
- 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 6.18.1, a crafted PDF containing a partially malformed /FlateDecode stream with padded data can force pypdf/filters.py to use inefficient byte-by-byte decompression while the earlier recovery counter fails to advance for bytes that successfully decode, causing long runtimes and application unavailability. This is a residual issue after the malformed FlateDecode recovery fix. This issue is fixed in version 6.18.1.