# FiloSottile/Heartbleed

A checker (site and tool) for CVE-2014-0160

Repository: https://github.com/FiloSottile/Heartbleed
Canonical: https://ross.abutalabs.com/products/heartbleed
Homepage: http://filippo.io/Heartbleed
Language: Go
License: MIT
License Family: permissive
Last push: 2021-02-24T09:17:24+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4531, "days_push": 2016, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2380, forks 453 (observed 2026-08-28T04:06:42.260473+00:00)

## What it is
A command-line tool and former web service for detecting the Heartbleed vulnerability (CVE-2014-0160) in TLS servers. Written in Go, it tests HTTPS and STARTTLS services and reports SAFE, VULNERABLE, or ERROR via exit codes.

## Use cases
- check if my server is vulnerable to heartbleed
- test cve-2014-0160 on a hostname
- scan smtp or ftp servers for heartbleed via starttls
- script a heartbleed check with exit codes
- verify openssl patch was applied correctly

## When to choose
- auditing legacy servers that may still run unpatched OpenSSL
- checking STARTTLS services like SMTP, IMAP, or FTP
- scripted or CI-based vulnerability checks needing exit codes

## When to avoid
- scanning for modern CVEs or general TLS misconfigurations
- needing a maintained web-based test (the public site was discontinued in 2019)
- comprehensive vulnerability scanning beyond Heartbleed

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, vulnerability-scanning, cli
- domain: security, developer-tools
- platform: windows, cli
- tags: heartbleed, cve-2014-0160, openssl, tls, starttls, go, command-line, linux, macos, docker

## Member repositories
- FiloSottile/Heartbleed (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:42.260473+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 2026-08-30T02:34:45.288524+00:00, confidence not recorded.
  - readme: https://github.com/FiloSottile/Heartbleed (fetched 2026-08-28T04:06:42.260473+00:00, sha 3722ba678afe)
  - homepage: http://filippo.io/Heartbleed (fetched 2026-08-29T10:15:43.048452+00:00, sha 2b12248e29ca)
  - site_page: https://filippo.io/Heartbleed/faq.html (fetched 2026-08-29T10:15:43.065094+00:00, sha 37daa1a6a3ed)
- Data as of 2026-08-30T08:39:29.467469+00:00.