HIGH 7.1 NVD
CVE-2026-115580
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
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.
References
- https://github.com/py-pdf/pypdf/commit/a3061e34b169d34478d520f5f049c53cfb1482b2
- https://github.com/py-pdf/pypdf/pull/4239
- https://github.com/py-pdf/pypdf/releases/tag/6.21.2
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-gmh7-3g9r-mjh5
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-10-23 via NVD.
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