agentsync-tool
This report shows the evidence for agentsync-tool@1.0.1, the only known version.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-6444 confirms this npm version as malicious.
Advisory
MAL-2026-6444
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in agentsync-tool (npm)
Details
The package advertises itself as a zero-dependency pure-JS markdown sync tool (~150 lines) but ships an undocumented 2.9MB Windows PE binary at bin/native/parser.node (sha256 b1aace6c70312a39ca39e6bba1d9abc6aaf9b23171089b1a548adc89f67f83c3) with no source, no binding.gyp, and no mention in README or CHANGELOG. src/index.js lines 30-34 attempt to load this binary via process.dlopen(module, p) at module load time under the comment 'Load native parser for performance'. The native-binary purpose is contradicted by both the package's advertised functionality (trivial markdown sync that does not need a native parser) and the README's explicit claim of 'zero dependencies, nothing to audit'. Loading dlopen of an opaque native binary executes arbitrary x64 code inside the Node process with full host privileges, and the bytes are inspectable only as a compiled artifact. Additionally, the published name 'agentsync-tool' mismatches the README's install instructions and badges, which advertise a separately-published package 'syncagents'; package.json's repository URL points at a non-git npm package page ('git+https://www.npmjs.com/package/syncagents.git'), and the author is a generic 'agentsync contributors'. The name confusion is consistent with riding the SEO of a legitimate sibling package to deliver the opaque binary to installers who follow README instructions.
References
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to agentsync-tool@1.0.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing agentsync-tool@1.0.1. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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