## pypdf: Possible long runtimes for repeated references to the same missing object

- 種別: advisory
- 重大度: high
- 関連技術: python
- CVE: CVE-2026-115572
- 公開日時: 2026-10-23T20:55:15.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-6c7f-9265-g8fw)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-6c7f-9265-g8fw

影響: pip:pypdf < 6.21.2 → 6.21.2
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading relevant parts of a file (like their pages) where the same, but non-existent indirect object is referenced multiple times. Patches This has been fixed in [pypdf==6.21.2](https://github.com/py-pdf/pypdf/releases/tag/6.21.2). Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4240](https://github.com/py-pdf/pypdf/pull/4240).