CVE-2026-71870

UNKNOWN 0.0

pypdf: Possible large memory usage for large /ToUnicode streams

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400
Vendor	py-pdf
Product	pypdf
Published	Aug 7, 2026

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Affected Versions

py-pdf / pypdf

< 6.15.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c github.com: https://github.com/py-pdf/pypdf/pull/3944 github.com: https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa github.com: https://github.com/py-pdf/pypdf/releases/tag/6.15.0