GitHub Advisoryadvisory · PyPI

GHSA-23jg-5f8m-gw8c PyBlade: SSTI/RCE via Bypassed AST Validation in sandbox.py

LOW Published 2026-04-05 Modified 2026-04-08 Official page ↗
Aliases
CVE-2026-5559
Ecosystem
PyPI
Packages
pyblade
Severity
Low
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-791
Reviewed
2026-04-08

Affected packages

• PyPI pyblade: >= 0.1.8-alpha, <= 0.2.0-alpha (no fix yet)

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.

Related

Alias · CVE (1)

  • CVE-2026-5559 A vulnerability has been found in AntaresMugisho PyBlade 0.1.8-alpha/0.1.9-alpha. vulnerability

Weakness · CWE (1)

  • CWE-791 Incomplete Filtering of Special Elements weakness

References