Bug 2544277 (CVE-2026-102996) - CVE-2026-102996 pypdf: pypdf: Denial of Service via excessive memory consumption during font parsing
Summary: CVE-2026-102996 pypdf: pypdf: Denial of Service via excessive memory consumpt...
Keywords:
Status: NEW
Alias: CVE-2026-102996
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-30 20:32 UTC by OSIDB Bzimport
Modified: 2026-10-01 18:04 UTC (History)
24 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-30 20:32:11 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can provide a TrueType or Type1 simple font with an unusually large /Widths array, causing pypdf/_font.py Font._collect_tt_t1_character_widths to process entries beyond the 256 character codes meaningful for a simple font and consume excessive memory during operations such as text extraction. This issue is fixed in version 6.18.1.
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