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OpenAdvisories
Critical · 9.3 Public exploit CVE-2025-61584 EUVD-2025-31664

serverless-dns is vulnerable to Command Injection through pr.yml GitHub Action Workflow

Published Sep 30, 2025 · Updated Sep 30, 2025 · Assigned by GitHub_M

Vendor: serverless-dns Product: serverless-dns

Description

serverless-dns is a RethinkDNS resolver that deploys to Cloudflare Workers, Deno Deploy, Fastly, and Fly.io. Versions through abd including 0.1.30 have a vulnerability where the pr.yml GitHub Action interpolates in an unsafe manner untrusted input, specifically the github.event.pull_request.head.repo.clone_url and github.head_ref, to a command in the runner. Due to the action using the pull_request_target trigger it has permissive permissions by default. An unauthorized attacker can exploit this vulnerability to push arbitrary data to the repository. The subsequent impact on the end-user is executing the attackers' code when running serverless-dns. This is fixed in commit c5537dd, and expected to be released in 0.1.31.

Affected products

VendorProductAffectedFixed
serverless-dns serverless-dns < 0.1.31 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • pvharmo2/gha-lab-6904b2ccbe ★ 0 · Sep 4, 2026

    Security-research lab: reproduction of CVE-2025-61584 (GHSA-9g7x-737f-5xpc) — command injection via github.head_ref in pull_request_target workflow (.github/workflows/pr.yml)

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References