CVE-2026-5559 | AntaresMugisho PyBlade 0.1.8-alpha/0.1.9-alpha AST Validation sandbox.py _is_safe_ast special elements used in a template engine

A vulnerability categorized as critical has been discovered in AntaresMugisho PyBlade 0.1.8-alpha/0.1.9-alpha. The affected element is the function _is_safe_ast of the file sandbox.py of the component AST Validation. Such manipulation leads to improper neutralization of special elements used in a template engine.

This vulnerability is listed as CVE-2026-5559. The attack may be performed from remote. In addition, an exploit is available.

The project was informed of the problem early through an issue report but has not responded yet.