medium6.0
CVE-2026-113794
pypdf: Possible infinite loop when hitting EOF in standard xref table
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pypdf | < 6.20.0 | 6.20.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-39mj-jf6j-2qj3
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-39mj-jf6j-2qj3
- https://github.com/py-pdf/pypdf/issues/4169
- https://github.com/py-pdf/pypdf/pull/4170
- https://github.com/py-pdf/pypdf/commit/37e1cd681744bac38b159f7e1c614eee8d639c58
- https://github.com/py-pdf/pypdf/releases/tag/6.20.0