GitHub Repository Pages Site Changed to Public — Sigma Rule

Rule metadata and linked tags

Author: Ivan Saakov. Source status: experimental; severity: low. Source dates: 2025-10-18 / not supplied.

{
  "product": "github",
  "service": "audit"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: f33efe94c90ac3d567e72fdc7e0374b1c80a79180a57c01ef63822d4e1a40f22

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: GitHub Repository Pages Site Changed to Public
id: 0c46d4f4-a2bf-4104-9597-8d653fc2bb55
status: experimental
description: |
    Detects when a GitHub Pages site of a repository is made public. This usually is part of a publishing process but could indicate or lead to potential unauthorized exposure of sensitive information or code.
references:
    - https://docs.github.com/en/pages/getting-started-with-github-pages/creating-a-github-pages-site
    - https://www.sentinelone.com/blog/exploiting-repos-6-ways-threat-actors-abuse-github-other-devops-platforms
    - https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/security-log-events
author: Ivan Saakov
date: 2025-10-18
tags:
    - attack.collection
    - attack.exfiltration
    - attack.t1567.001
logsource:
    product: github
    service: audit
detection:
    selection:
        action: 'repo.pages_public'
    condition: selection
falsepositives:
    - Legitimate publishing of repository pages by authorized users
level: low

Original YAML and metadata in JSON

False positives

• Legitimate publishing of repository pages by authorized users

Source references

• https://docs.github.com/en/pages/getting-started-with-github-pages/creating-a-github-pages-site
• https://www.sentinelone.com/blog/exploiting-repos-6-ways-threat-actors-abuse-github-other-devops-platforms
• https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/security-log-events