CVE-2024-58354 PUBLISHED

cal.com Repository Takeover via pull_request_target Workflow

Assigner: VulnCheck
Reserved: 08.06.2026 Published: 23.07.2026 Updated: 24.07.2026

cal.com (calcom repository, later renamed cal.diy) is affected by a repository takeover vulnerability in its GitHub Actions workflows. The workflow pr.yml uses the pull_request_target trigger with the repository's default write permissions and passes them down to check-types.yml. check-types.yml then performs a 'dangerous' checkout of the attacker-submitted pull request code (via the dangerous-git-checkout action) and subsequently executes it (through yarn install and package.json scripts). An attacker can open a pull request whose code runs arbitrary commands with the repository's write-scoped GITHUB_TOKEN, allowing them to push commits, merge or mutate pull requests, add or delete comments, and delete or force-push branches, thereby compromising the repository. The main branch is affected; no patched version is available.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H
CVSS Score: 8.5

Product Status

Vendor calcom
Product cal.diy
Versions Default: affected

Credits

  • jsoref reporter

References

Problem Types

  • Improper Neutralization of Special Elements used in a Command ('Command Injection') CWE