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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.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-05 | Updated 2026-04-06 | Assigner VulDB




MEDIUM: 5.3CVSS: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
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Improper Neutralization of Special Elements Used in a Template Engine

Incomplete Filtering of Special Elements

Product status

0.1.8-alpha
affected

0.1.9-alpha
affected

Timeline

2026-04-04:Advisory disclosed
2026-04-04:VulDB entry created
2026-04-04:VulDB entry last update

Credits

zhangxinyu06 (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/355329 (VDB-355329 | AntaresMugisho PyBlade AST Validation sandbox.py _is_safe_ast special elements used in a template engine) vdb-entry technical-description

vuldb.com/vuln/355329/cti (VDB-355329 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/782904 (Submit #782904 | AntaresMugisho PyBlade v0.1.8-alpha through v0.2.0-alph Code Injection) third-party-advisory

github.com/AntaresMugisho/PyBlade/issues/1 issue-tracking

github.com/AntaresMugisho/PyBlade/issues/1 exploit issue-tracking

github.com/AntaresMugisho/PyBlade/ product

cve.org (CVE-2026-5559)

nvd.nist.gov (CVE-2026-5559)

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