CVE-2026-71870 — pypdf: Possible large memory usage for large /ToUnicode streams
pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unus…
Published: 2026-08-07 · CVSS: 4.8 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7