Bug 2563680 (CVE-2026-119209) - CVE-2026-119209 pypdf: pypdf: Denial of Service via crafted cross-reference streams
Summary: CVE-2026-119209 pypdf: pypdf: Denial of Service via crafted cross-reference s...
Keywords:
Status: NEW
Alias: CVE-2026-119209
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-29 20:56 UTC by OSIDB Bzimport
Modified: 2026-11-04 09:17 UTC (History)
22 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-29 20:56:53 UTC 
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory while opening a crafted PDF containing cross-reference streams that declare very large entry counts. Highly compressible streams and /Prev chains can multiply the number of parsed entries across a document, while negative /Index counts can bypass the existing per-stream clamp. This issue is fixed in version 6.21.3.
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