Bug 2527050 (CVE-2026-84311) - CVE-2026-84311 pypdf: pypdf: Denial of Service via crafted PDF XForm objects
Summary: CVE-2026-84311 pypdf: pypdf: Denial of Service via crafted PDF XForm objects
Keywords:
Status: NEW
Alias: CVE-2026-84311
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: 2528071 2528073
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-01 20:21 UTC by OSIDB Bzimport
Modified: 2026-09-03 14:53 UTC (History)
22 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-09-01 20:21:24 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.
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