What’s Vulnerable › Vulnerabilities

CVE-2026-5559: AntaresMugisho PyBlade AST Validation sandbox.py _is_safe_ast special elements used in a template engine

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-05 · updated 2026-07-24
• Weakness: CWE-791

Description

A vulnerability has been found 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. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

• AntaresMugisho PyBlade: 0.1.8-alpha, 0.1.9-alpha

References

• https://github.com/AntaresMugisho/PyBlade/
• https://github.com/AntaresMugisho/PyBlade/issues/1
• https://github.com/AntaresMugisho/PyBlade/issues/1#issue-4086730906
• https://vuldb.com/submit/782904
• https://vuldb.com/vuln/355329
• https://vuldb.com/vuln/355329/cti

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