Bug 2512850 - CVE-2026-71870 python-pypdf: pypdf: Denial of Service via crafted PDF with large /ToUnicode streams [fedora-all]
Summary: CVE-2026-71870 python-pypdf: pypdf: Denial of Service via crafted PDF with la...
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: python-pypdf
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Davide Cavalca
QA Contact:
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: 2026-08-11 07:12 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-08-11 07:12:05 UTC
Type: ---
Embargoed:

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Description Ganesh 2026-08-09 04:39:27 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 Tadej Janež 2026-08-11 07:12:05 UTC 
Version 6.15.0 is in rawhide.

For Fedora 44/43, I'm reluctant to upgrade them since it would be upgrading 2 major versions (from 4.2.0 to 6.15.0) in a stable release.
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