CVE-2023-36464 (published 2023-06-27T21:24:30.685Z)
pypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b"\r", b"\n")` in `pypdf/generic/_data_structures.py` to `while peek not in (b"\r", b"\n", b"")`.
Affected products: Vendor: py-pdf
Product: pypdf
Versions:  pypdf: < 3.90, PyPDF2: >= 2.2.0