Bug 2441495 (CVE-2026-27026) - CVE-2026-27026 pypdf: pypdf: Denial of Service via malformed PDF /FlateDecode stream
Summary: CVE-2026-27026 pypdf: pypdf: Denial of Service via malformed PDF /FlateDecode...
Keywords:
Status: NEW
Alias: CVE-2026-27026
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: 2026-02-20 22:02 UTC by OSIDB Bzimport
Modified: 2026-02-20 22:40 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-02-20 22:02:01 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. This vulnerability is fixed in 6.7.1.
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