PatchSiren cyber security CVE debrief
CVE-2026-55576 MaaAssistantArknights CVE debrief
CVE-2026-55576 is a high severity vulnerability in MaaAssistantArknights, a one-click tool for daily Arknights tasks. The vulnerability exists in the .github/workflows/release-preparation.yml file, where attacker-controlled github.event.pull_request.title is inlined into a run: shell command during the pull_request opened, reopened, and ready_for_review events. This allows a non-draft fork PR whose title starts with 'Release v' to execute shell commands on the ubuntu-latest runner during the generate-changelog job. The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity.
- Vendor
- MaaAssistantArknights
- Product
- Unknown
- CVSS
- HIGH 8.8
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-15
- Original CVE updated
- 2026-07-16
- Advisory published
- 2026-07-15
- Advisory updated
- 2026-07-16
Who should care
Users of MaaAssistantArknights, especially those using the dev-v2 workflow, should be aware of this vulnerability and take immediate action to mitigate the risk. This includes reviewing and updating the .github/workflows/release-preparation.yml file to prevent similar vulnerabilities in the future and monitoring for any suspicious activity related to the generate-changelog job.
Technical summary
The vulnerability is caused by the inlining of attacker-controlled github.event.pull_request.title into a run: shell command during specific events in the .github/workflows/release-preparation.yml file. This allows a non-draft fork PR whose title starts with 'Release v' to execute shell commands on the ubuntu-latest runner during the generate-changelog job. The vulnerability exists in MaaAssistantArknights, a one-click tool for daily Arknights tasks, specifically in the dev-v2 workflow.
Defensive priority
High priority should be given to patching this vulnerability, as it has a CVSS score of 8.8 and is classified as HIGH severity.
Recommended defensive actions
- Patch the vulnerability by applying the fix provided in commit cafc3946059e6337d2089d4fec8b6885ba17c332.
- Review and update the .github/workflows/release-preparation.yml file to prevent similar vulnerabilities in the future.
- Monitor for any suspicious activity related to the generate-changelog job.
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
- Review compensating controls for exposed systems while remediation is scheduled and verified.
- Check relevant monitoring, detection, and logs for exposed assets that need extra review.
- Track exceptions, retest remediated assets, and close the item only after evidence is documented.
Evidence notes
The vulnerability was reported by an unknown source and is fixed by commit cafc3946059e6337d2089d4fec8b6885ba17c332. The CVE record was published on 2026-07-15T22:17:26.157Z and last modified on 2026-07-16T13:52:58.290Z. Evidence of the vulnerability's existence and impact is limited, and defenders should verify the affected scope and severity.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-15T22:17:26.157Z and has not been modified since then.