AntaresMugisho PyBlade AST Validation sandbox.py _is_safe_ast special elements used in a template engine
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1336.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AntaresMugisho | PyBlade | 0.1.8-alpha; 0.1.9-alpha | — | No fix listed | CNA |
| — | pyblade (PyPI) | 0.1.8-alpha – 0.2.0-alpha | — | No fix listed | GHSA-23jg-5f8m-gw8c |
- PyBlade VendorAntaresMugisho Affected 0.1.8-alpha; 0.1.9-alpha Fixed in — No fix listed CNA
- pyblade (PyPI) Vendor— Affected 0.1.8-alpha – 0.2.0-alpha Fixed in — No fix listed GHSA-23jg-5f8m-gw8c
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-5559
- 2026-10-03 Alias added: GHSA-23jg-5f8m-gw8c
References
Sources
- CVE-2026-5559 · CVE Program
- CVE-2026-5559 · NVD
- FIRST EPSS
- GHSA-23jg-5f8m-gw8c · GitHub Advisory Database · CC BY 4.0
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