Vulnerability in Antaresmugisho Pyblade
CVE-2026-5559
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Antaresmugisho Pyblade — versions 0.1.8-alpha, 0.1.9-alpha
Weakness classification (CWE)
References
- vuldb.com/vuln/355329 (technical-description, vdb-entry)
- vuldb.com/vuln/355329/cti (signature, permissions-required)
- vuldb.com/submit/782904 (third-party-advisory)
- github.com/AntaresMugisho/PyBlade/issues/1 (issue-tracking)
- github.com/AntaresMugisho/PyBlade/issues/1 (issue-tracking, exploit)
- github.com/AntaresMugisho/PyBlade/ (product)
Frequently asked questions
- What is CVE-2026-5559?
- CVE-2026-5559 is a medium-severity vulnerability in Antaresmugisho Pyblade, classified under CWE-791. CVSS score: 6.3/10. Published 2026-04-05.
- How severe is CVE-2026-5559?
- Medium severity. CVSS v3 base score is 6.3 out of 10.