PYSEC-2026-1837
PyPDF2 quadratic runtime with malformed PDF missing xref marker
At a glance
- Published
- Updated
- CVE
- CVE-2023-36810
- Aliases
- GHSA-jrm6-h9cq-8gqw
- CVSS_V3
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
### Impact An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. ### Patches https://github.com/py-pdf/pypdf/pull/808 ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References * [PyPDF2 PR #808](https://github.com/py-pdf/pypdf/pull/808) * [PyPDF2 Issue #582](https://github.com/py-pdf/pypdf/issues/582)
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf2 | introduced 0, fixed 1.27.9 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-jrm6-h9cq-8gqw WEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-36810 ADVISORY
- https://github.com/py-pdf/pypdf/issues/582 WEB
- https://github.com/py-pdf/pypdf/pull/808 WEB
- https://github.com/py-pdf/pypdf/commit/c6c56f550bb384e05f0139c796ba1308837d6373 FIX
- https://github.com/py-pdf/pypdf PACKAGE
- https://lists.debian.org/debian-lts-announce/2023/07/msg00019.html WEB
- https://pypi.org/project/pypdf2 PACKAGE
- https://github.com/advisories/GHSA-jrm6-h9cq-8gqw ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |