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CVE-2026-102995

pypdf: Possible large memory usage for large /ToUnicode streams (Follow-up 2)

CVSS 4.0 8.7 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-102995

Published

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. This issue is fixed in version 6.18.1.

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Advisory history

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23 Oct 2026 15:48:27 UTC

pypdf: Possible large memory usage for large /ToUnicode streams (Follow-up 2)

cve-program · CVE-2026-102995 · Published

This historical link shows only this version and versions saved before it. Browse all advisory history.

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