pypdf: pypdf is a free and open-source pure-python PDF library
CVE-2026-27026 is fixed in pypdf on 1 platform by DEBIAN-CVE-2026-27026 (version 6.9.0-1), released February 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, 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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pypdf · Debian 14 | 6.9.0-1 | DEBIAN-CVE-2026-27026 | Feb 20, 2026 |
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