CVE-2026-113794
pypdf: Possible infinite loop when hitting EOF in standard xref table
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.
| CWE | CWE-835 |
| Vendor | py-pdf |
| Product | pypdf |
| Published | Oct 21, 2026 |
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Affected Versions
py-pdf / pypdf
< 6.20.0
References
github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-39mj-jf6j-2qj3 github.com: https://github.com/py-pdf/pypdf/issues/4169 github.com: https://github.com/py-pdf/pypdf/pull/4170 github.com: https://github.com/py-pdf/pypdf/commit/37e1cd681744bac38b159f7e1c614eee8d639c58 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.20.0