Bug 2544273 (CVE-2026-102995) - CVE-2026-102995 pypdf: pypdf: Denial of Service via excessive memory consumption in font mapping
Summary: CVE-2026-102995 pypdf: pypdf: Denial of Service via excessive memory consumpt...
Keywords:
Status: NEW
Alias: CVE-2026-102995
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-30 20:31 UTC by OSIDB Bzimport
Modified: 2026-10-15 21:32 UTC (History)
23 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-30 20:31:50 UTC 
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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