pypdf: pypdf is a free and open-source pure-python PDF library
CVE-2026-22691 is fixed in pypdf on 1 platform by DEBIAN-CVE-2026-22691 (version 6.9.0-1), released January 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pypdf · Debian 14 | 6.9.0-1 | DEBIAN-CVE-2026-22691 | Jan 10, 2026 |
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