PYSEC-2026-1829
pypdf has possible long runtimes for missing /Root object with large /Size values
En bref
- Publiée
- Mise à jour
- CVE
- CVE-2026-22690
- Alias
- GHSA-4xc4-762w-m6cg
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Description
### Impact An attacker who exploits this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the `/Root` entry in the trailer, while using a rather large `/Size` value. Only the non-strict reading mode is affected. ### Patches This has been fixed in [pypdf==6.6.0](https://github.com/py-pdf/pypdf/releases/tag/6.6.0). ### Workarounds ```python from pypdf import PdfReader, PdfWriter # Instead of reader = PdfReader("file.pdf") # use the strict mode: reader = PdfReader("file.pdf", strict=True) # Instead of writer = PdfWriter(clone_from="file.pdf") # use an explicit strict reader: writer = PdfWriter(clone_from=PdfReader("file.pdf", strict=True)) ``` ### Resources This issue has been fixed in #3594.
Paquets affectés
| Paquet | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.6.0 |
Références
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-4xc4-762w-m6cg WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-22690 ADVISORY
- https://github.com/py-pdf/pypdf/pull/3594 WEB
- https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45 WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.6.0 WEB
- https://pypi.org/project/pypdf PACKAGE
- https://github.com/advisories/GHSA-4xc4-762w-m6cg ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |