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

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).

在 GitHub Advisory Database 阅读

2026/10/24 05:55，GitHub Advisory Database 发布了“pypdf: Possible long runtimes for repeated references to the same missing object”（类型：漏洞公告）。严重程度为“高危”（high）。相关技术：Python。CVE：CVE-2026-115572。