Vulnerabilities CVE-2026-71870

CVE-2026-71870

Medium

Open

TLP:CLEAR

pypdf: Possible large memory usage for large /ToUnicode streams

NVD CVE.org

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Description

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.

Details

CVSS Score: 4.8
EPSS Score ⓘ: 0.13%

2.9th percentile
CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Confidence: 90%
Published: Aug 7, 2026
Last Modified: Aug 10, 2026

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