Bug 2527430 (CVE-2026-84309) - CVE-2026-84309 pypdf: pypdf: Denial of Service via crafted PDF with cyclic tree structure
Summary: CVE-2026-84309 pypdf: pypdf: Denial of Service via crafted PDF with cyclic tr...
Keywords:
Status: NEW
Alias: CVE-2026-84309
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-02 14:00 UTC by OSIDB Bzimport
Modified: 2026-09-04 10:16 UTC (History)
22 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-09-02 14:00:26 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to follow /Next links indefinitely when a writing code path inserts a child, producing an infinite loop. This issue is fixed in version 6.16.0.
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