calcom cal.diy GitHub Actions Workflow pr.yml dangerous-git-checkout privileges management

Summaryinfo

A vulnerability has been found in calcom cal.diy and classified as critical. This affects the function dangerous-git-checkout of the file pr.yml of the component GitHub Actions Workflow. This manipulation causes privileges management. The identification of this vulnerability is CVE-2024-58354. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in calcom cal.diy (the affected version unknown) and classified as critical. Affected by this vulnerability is the function dangerous-git-checkout of the file pr.yml of the component GitHub Actions Workflow. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2024-58354 since 06/08/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/23/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• calcom

Name

• cal.diy

Website

• Product: https://github.com/calcom/cal.diy/

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