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GitHub Actions의 토큰·외부 입력 위험 점검하기

gha-security-review · 스킬 지원 에이전트

공식 배포스킬 설치AI 요금 확인

GitHub Actions에서 외부 PR 입력, 토큰 권한과 실행 흐름의 보안 문제를 검토합니다.

어떤 스킬인가요?

외부 기여를 받는 저장소나 배포 자동화를 만드는 프로젝트에서 활용합니다. 어떤 이벤트로 실행되는지, 신뢰하지 않는 코드가 권한이 있는 작업에 섞이는지를 중심으로 점검합니다.

워크플로 파일과 사용하는 액션, 비밀값 접근 범위를 함께 제공하세요. 위험한 입력이 셸 명령이나 배포 단계에 도달하는 경로를 확인하고 권한을 줄이는 방향을 요청할 수 있습니다. 실제 배포 설정을 변경하기 전에 테스트 저장소에서 영향을 살펴보세요.

이렇게 요청해보세요

gha-security-review로 아래 워크플로를 검토해줘. 외부 PR 입력과 GITHUB_TOKEN 권한을 추적하고 위험 근거와 최소 권한 설정안을 제안해줘.

받을 수 있는 결과워크플로 취약점과 권한 개선안

외부 PR 코드와 쓰기 권한이 만나는 지점

2026-10-05 격리된 YAML과 스크립트를 읽어 검토했습니다. GitHub에 업로드하거나 실제 워크플로를 실행하지 않았습니다.

검토한 설정

예제 워크플로는 pull_request_target에서 시작하고 contents: write 권한을 사용했습니다. 이후 PR의 head commit을 체크아웃하고 그 안의 user-script.js를 실행했습니다. 이벤트 이름, 권한, 체크아웃 대상과 실행 파일을 이어서 보는 것이 중요합니다.

event: pull_request_target
permissions: contents: write
checkout ref: github.event.pull_request.head.sha
run: node user-script.js

왜 이 조합이 문제인가

외부 기여자가 바꿀 수 있는 파일을 권한이 있는 작업에서 실행하게 됩니다. 각각의 설정을 따로 읽으면 놓치기 쉽습니다. 검토 결과에서는 신뢰할 수 없는 PR 테스트와 신뢰한 코드의 릴리스 작업을 분리하는 방향을 제안했습니다.

적용 전에 확인할 질문

어떤 이벤트에서 실행되는지, 실제 필요한 권한은 무엇인지, 외부 코드를 실행하는 단계가 있는지부터 확인하세요. 환경별 토큰과 저장소 설정에 따라 영향이 달라집니다. 이 예제의 검토를 내 저장소의 안전성 보장으로 해석해서는 안 됩니다.

처음 사용한다면

  1. 설치하고 준비하기

    스킬 지원 에이전트와 워크플로 파일이 필요합니다. CI 실행·권한 변경·배포는 별도입니다.

    설치 요청 보기

    현재 사용 중인 스킬 지원 에이전트에 아래 요청을 붙여넣으세요. SKILL.md만 복사하면 보조 파일이 빠질 수 있어요.

    설치 요청
    https://github.com/getsentry/skills 에서 skills/gha-security-review 스킬을 현재 에이전트의 스킬 폴더에 설치해줘. SKILL.md와 이 스킬이 참조하는 scripts·references·assets와 공통 파일을 함께 유지하고, 필요한 실행 환경과 추가 연결을 확인한 뒤 알려줘. 설치가 끝나면 gha-security-review 스킬을 인식하는지 확인해줘.

  2. 스킬 이름과 자료를 함께 요청하기

    “gha-security-review 스킬을 사용해줘. 입력 자료: .github/workflows·이벤트·권한 설정”처럼 요청하세요. 위의 예시를 내 자료에 맞게 바꿔도 좋아요.

  3. 결과 확인하기

    예상 결과는 ‘워크플로 취약점과 권한 개선안’입니다. 필요한 내용이 포함됐는지 확인하세요. 입력 자료의 사실·숫자와 결과를 대조하고, 부족한 부분을 이어서 요청하세요.

제작자 원본 2026-10-04 확인 · 설치 안내 2026-10-04 확인 · 격리 폴더 설치·샘플 검토 2026-10-05 확인 · 에이전트 자동 호출 미검증

모델 사용 요금과 연결 앱 요금은 이용 중인 서비스의 정책을 따릅니다.

설치 안내 출처
SKILL.md

출처 · Apache-2.0getsentry 원본
Original skill: getsentry/skills/skills/gha-security-review/SKILL.md
Source: https://github.com/getsentry/skills/blob/d18b7aa8ba878354e5c348310230e652f7690f9c/skills/gha-security-review/SKILL.md
License: Apache-2.0

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SKILL.md 본문입니다. 원문에서 참조하는 스크립트·보조 파일은 원본 패키지에 포함되어 있습니다.