pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4.
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Solution
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References
History
Thu, 29 Oct 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4. | |
| Title | pypdf: Possible large memory usage when parsing page tree | |
| Weaknesses | CWE-400 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-29T20:34:02.704Z
Reserved: 2026-10-29T16:04:48.729Z
Link: CVE-2026-119204
No data.
Status : Received
Published: 2026-10-29T21:17:19.527
Modified: 2026-10-29T21:17:19.527
Link: CVE-2026-119204
No data.
OpenCVE Enrichment
Updated: 2026-10-29T21:30:15Z
Weaknesses