# sigp/solidity-security-blog

Comprehensive list of known attack vectors and common anti-patterns

Repository: https://github.com/sigp/solidity-security-blog
Canonical: https://ross.abutalabs.com/products/solidity-security-blog
Homepage: https://blog.sigmaprime.io/solidity-security.html
License: NOASSERTION
License Family: other
Last push: 2022-09-23T12:06:25+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3017, "days_push": 1440, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1522, forks 217 (observed 2026-08-28T04:04:58.042498+00:00)

## What it is
A comprehensive reference documenting known Solidity smart contract attack vectors and common anti-patterns, hosted on GitHub as the basis for a Sigma Prime blog post and the Mastering Ethereum book. Each vulnerability is explained with its mechanics, preventative techniques, and real-world exploit examples like The DAO and the Parity wallet hacks.

## Use cases
- learn common solidity smart contract vulnerabilities
- understand how the DAO reentrancy hack happened
- find preventative techniques for solidity security flaws
- study real-world ethereum exploit case studies
- review smart contract anti-patterns before an audit
- learn about delegatecall and parity wallet hacks
- understand arithmetic overflow vulnerabilities in solidity

## When to choose
- you are learning solidity or ethereum smart contract security
- you need real-world examples of famous exploits like The DAO or Parity multisig hacks
- you want a curated checklist of attack vectors to review before writing or auditing contracts

## When to avoid
- you need an automated vulnerability scanner or static analysis tool rather than educational material
- you need coverage of the latest vulnerabilities, as the content was last substantially updated in 2018
- you need executable code or a library rather than documentation

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: security, documentation, developer-tools
- domain: blockchain, security, tutorials, developer-tools
- platform: -
- tags: solidity, ethereum, smart-contract-security, attack-vectors, anti-patterns, blockchain-security, educational, smart-contracts, web-server

## Member repositories
- sigp/solidity-security-blog (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:58.042498+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:31:49.395091+00:00, confidence not recorded.
  - readme: https://github.com/sigp/solidity-security-blog (fetched 2026-08-28T04:04:58.042498+00:00, sha 51702f587b06)
  - homepage: https://blog.sigmaprime.io/solidity-security.html (fetched 2026-08-29T11:35:11.414901+00:00, sha fd4d79d3db19)
  - site_page: https://sigmaprime.io/about (fetched 2026-08-29T11:35:11.420563+00:00, sha 7b312b50f7d9)
- Data as of 2026-08-30T08:39:29.467469+00:00.