Bug 2563679 (CVE-2026-119203) - CVE-2026-119203 pypdf: pypdf: Denial of Service via infinite loop on crafted incomplete PDF
Summary: CVE-2026-119203 pypdf: pypdf: Denial of Service via infinite loop on crafted ...
Keywords:
Status: NEW
Alias: CVE-2026-119203
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: 2026-10-29 20:54 UTC by OSIDB Bzimport
Modified: 2026-10-29 21:05 UTC (History)
23 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-29 20:54:57 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeatedly rewind to the same stream position instead of terminating when parsing makes no progress, blocking the processing thread. This issue is fixed in version 6.21.4.
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