pypdf: Possible long runtimes for large xref table header limits

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).

在 GitHub Advisory Database 阅读

2026/10/24 05:54，GitHub Advisory Database 发布了“pypdf: Possible long runtimes for large xref table header limits”（类型：漏洞公告）。严重程度为“高危”（high）。相关技术：Python。CVE：CVE-2026-115580。