crates.io package intelligence

syn — deep security report

ShadowCanopy's full breakdown of syn on crates.io: verdict, AI analysis, dependency chain, network behavior, prebuilds, and obfuscated code.

Safe to use
Deep-scanned by ShadowCanopy — no threats found in its code, dependencies, or network behavior.
Scanned 9/8/2026
Approvedsyn@3.0.5View on registry ↗latest: 3.0.5

False positive from heuristic matching 'F::' in a generic function signature (parse_scoped<F: Parser> ... F::Output). This is the legitimate, widely-used 'syn' parsing library with no malicious behavior in the provided source.

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AI breakdown

Plain-English summary of what this package does and how it behaves.

syn 3.0.5 is a Rust crate that parses Rust token streams into structured syntax trees. It supports attributes, expressions, derives, data types, and related language constructs via its src modules.

Capabilities

  • Parses Rust tokens into syntax trees
  • Handles attributes, derives, and expressions
  • Includes benchmarks for file and Rust parsing
  • No scripts or dependencies declared

Data access

  • None observed

Network

  • No network access observed

Standard Rust parsing library with no evident runtime behaviors beyond code analysis. Static findings reference hardcoded IPs but are not supported by the provided source files.

Security findings (2)

Static analysis rule matches, with the exact code that triggered them.

highHardcoded public IP in network codeATK-028src/parse.rs

File src/parse.rs contains a hardcoded public IP (F::) used in network code — review for hidden exfiltration or C2 endpoints.

highHardcoded public IP in network codeATK-028syn-3.0.5/src/parse.rs

File syn-3.0.5/src/parse.rs contains a hardcoded public IP (F::) used in network code — review for hidden exfiltration or C2 endpoints.

Files in package (208)

.cargo_vcs_info.jsonsyn-3.0.5/.cargo_vcs_info.jsonCargo.locksyn-3.0.5/Cargo.lockCargo.tomlsyn-3.0.5/Cargo.tomlCargo.toml.origsyn-3.0.5/Cargo.toml.origLICENSE-APACHEsyn-3.0.5/LICENSE-APACHELICENSE-MITsyn-3.0.5/LICENSE-MITREADME.mdsyn-3.0.5/README.mdbenches/file.rssyn-3.0.5/benches/file.rsbenches/rust.rssyn-3.0.5/benches/rust.rssrc/attr.rssyn-3.0.5/src/attr.rssrc/bigint.rssyn-3.0.5/src/bigint.rssrc/buffer.rssyn-3.0.5/src/buffer.rssrc/classify.rssyn-3.0.5/src/classify.rssrc/custom_keyword.rssyn-3.0.5/src/custom_keyword.rssrc/custom_punctuation.rssyn-3.0.5/src/custom_punctuation.rssrc/data.rssyn-3.0.5/src/data.rssrc/derive.rssyn-3.0.5/src/derive.rssrc/discouraged.rssyn-3.0.5/src/discouraged.rssrc/drops.rssyn-3.0.5/src/drops.rssrc/error.rssyn-3.0.5/src/error.rs

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This report reflects ShadowCanopy's threat intelligence at page load and is informational, not a warranty. Canonical URL: https://shadowcanopy.dev/packages/crates/syn