MaaAssistantArknights Pull Request Title release-preparation.yml pull_request.title os command injection

Summaryinfo

A vulnerability has been found in MaaAssistantArknights and classified as very critical. Affected by this vulnerability is an unknown functionality of the file .github/workflows/release-preparation.yml of the component Pull Request Title Handler. The manipulation of the argument pull_request.title leads to os command injection. This vulnerability is referenced as CVE-2026-55576. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in MaaAssistantArknights (the affected version unknown) and classified as very critical. This issue affects an unknown part of the file .github/workflows/release-preparation.yml of the component Pull Request Title Handler. The manipulation of the argument pull_request.title with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

MaaAssistantArknights is a one-click tool for daily Arknights tasks. In the current dev-v2 workflow, .github/workflows/release-preparation.yml inlined attacker-controlled github.event.pull_request.title into a run: shell command during the pull_request opened, reopened, and ready_for_review events, so a non-draft fork PR whose title starts with Release v could execute shell commands on the ubuntu-latest runner during the generate-changelog job. This vulnerability is fixed by commit cafc3946059e6337d2089d4fec8b6885ba17c332.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-55576 since 06/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/16/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

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

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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• MaaAssistantArknights

Website

• Product: https://github.com/MaaAssistantArknights/MaaAssistantArknights/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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