The vulnerability CVE-2026-41313 in pypdf (versions before 6.10.2) is due to excessive iteration when loading PDF files that contain a large trailer /Size value in incremental mode. This can cause the library to spend an unusually long time processing such crafted PDFs, resulting in performance degradation or denial of service conditions. The issue is addressed by the fix included in pypdf version 6.10.2. No cloud service is involved, and no known exploits have been reported.

An attacker can craft a malicious PDF that triggers long processing times in vulnerable versions of pypdf, potentially causing denial of service or resource exhaustion on systems that parse such PDFs. The impact is limited to local processing of malicious PDFs and does not involve remote code execution or data compromise. No known exploits are currently reported in the wild.

Upgrade to pypdf version 6.10.2 or later, where this vulnerability is fixed. Alternatively, users may manually apply the patch changes from the fix if upgrading is not immediately possible. There is no vendor advisory indicating that no action is required or that the issue is already mitigated otherwise.