pypdf: pypdf is a free and open-source pure-python PDF library
CVE-2026-102997 is fixed in pypdf on 1 platform by DEBIAN-CVE-2026-102997 (version 6.19.0-1), released October 4, 2026. It is not reported as exploited. Patch Radar priority: High.
pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF containing a partially malformed /FlateDecode stream with padded data can force pypdf/filters.py to use inefficient byte-by-byte decompression while the earlier recovery counter fails to advance for bytes that successfully decode, causing long runtimes and application unavailability. This is a residual issue after the malformed FlateDecode recovery fix. This issue is fixed in version 6.18.1.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pypdf · Debian 14 | 6.19.0-1 | DEBIAN-CVE-2026-102997 | Oct 4, 2026 |
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