CVE-2026-119204 is a vulnerability in the pdfalyzer product related to the pypdf library. It allows an attacker to craft a malicious PDF that causes large memory usage during parsing of the page tree with many shared resources. This can lead to high resource consumption on the affected system. A fix is available in pypdf version 6.21.4. If upgrading is not possible, applying the changes from pull request #4290 is recommended as a workaround.