CVE-2026-115580 — pypdf: Possible long runtimes for large xref table header limits
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds wh…
Published: 2026-10-23 · CVSS: 7.1 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.
Source: CVE Program · Revision db05a1c62c0469669d7e26796862e22314b38180