{"cve":"CVE-2026-5559","nvd":{"published":"2026-04-05T11:16:55.900","modified":"2026-07-24T20:10:00.147","status":"Deferred","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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","score":2.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","score":6.3},"cwes":["CWE-791","CWE-1336"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-5559","score":0.00314,"percentile":0.24319,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-23jg-5f8m-gw8c","url":"https://osv.dev/vulnerability/GHSA-23jg-5f8m-gw8c","summary":"PyBlade: SSTI/RCE via Bypassed AST Validation in sandbox.py","modified":"2026-07-13T16:43:41.508208160Z","packages":[{"ecosystem":"PyPI","name":"pyblade","purl":"pkg:pypi/pyblade","ranges":[">=0.1.8-alpha <=0.2.0-alpha"],"fixed":[]}]},{"id":"PYSEC-2026-2975","url":"https://osv.dev/vulnerability/PYSEC-2026-2975","summary":"PyBlade: SSTI/RCE via Bypassed AST Validation in sandbox.py","modified":"2026-07-13T16:32:08.041280749Z","packages":[{"ecosystem":"PyPI","name":"pyblade","purl":"pkg:pypi/pyblade","ranges":[">=0.1.8-alpha <=0.2.0-alpha"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}