Bug 2512627 (CVE-2026-71870) - CVE-2026-71870 pypdf: pypdf: Denial of Service via crafted PDF with large /ToUnicode streams
Summary: CVE-2026-71870 pypdf: pypdf: Denial of Service via crafted PDF with large /To...
Keywords:
Status: NEW
Alias: CVE-2026-71870
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2512851 2512850
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-07 19:41 UTC by OSIDB Bzimport
Modified: 2026-08-15 08:27 UTC (History)
22 users (show)

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-08-07 19:41:36 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.