Bug 2512851 - CVE-2026-71870 python-PyPDF2: pypdf: Denial of Service via crafted PDF with large /ToUnicode streams [fedora-all]
Summary: CVE-2026-71870 python-PyPDF2: pypdf: Denial of Service via crafted PDF with l...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: python-PyPDF2
Version: 45
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Ranjan Maitra
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["59ef65a0-4471-41f4-ab36-1...
Depends On:
Blocks: CVE-2026-71870
TreeView+ depends on / blocked
 
Reported: 2026-08-09 04:39 UTC by Ganesh
Modified: 2026-08-17 15:49 UTC (History)
2 users (show)

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

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Description Ganesh 2026-08-09 04:39:31 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.
Comment 1 Aoife Moloney 2026-08-17 15:49:30 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
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