Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. This vulnerability is fixed in 6.7.1.

INFO

Published Date :

2026-02-20T21:12:33.537Z

Last Modified :

2026-02-24T18:47:02.304Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-27026 vulnerability.

Vendors Products
Py-pdf
  • Pypdf
Pypdf Project
  • Pypdf
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27026.

URL Resource
https://github.com/py-pdf/pypdf/commit/7905842d833f899f1d3228af7e7467ad80277016 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/pull/3644 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/releases/tag/6.7.1 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mvc-8737-8j8h cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-27026 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-27026 cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact