## pypdf: Possible long runtimes for large xref table header limits

- 種別: advisory
- 重大度: high
- 関連技術: python
- CVE: CVE-2026-115580
- 公開日時: 2026-10-23T20:54:12.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-gmh7-3g9r-mjh5)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-gmh7-3g9r-mjh5

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 opening a file with large/wrong upper limits in the xref table. 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 [#4239](https://github.com/py-pdf/pypdf/pull/4239).