pypdf: pypdf is a free and open-source pure-python PDF library
CVE-2026-84309 is fixed in pypdf on 1 platform by DEBIAN-CVE-2026-84309 (version 6.19.0-1), released September 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to follow /Next links indefinitely when a writing code path inserts a child, producing an infinite loop. This issue is fixed in version 6.16.0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pypdf · Debian 14 | 6.19.0-1 | DEBIAN-CVE-2026-84309 | Sep 1, 2026 |
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