CVE-2026-54532 CloudPirates-io CVE debrief

Who should care

Defenders responsible for securing Helm Charts and workflows should be aware of this vulnerability and take steps to verify the integrity of their charts and ensure that workflows are properly configured to prevent cache poisoning and OIDC token theft.

Why it matters

CVE-2026-54532 is a vulnerability in CloudPirates Open Source Helm Charts that allows for cache poisoning and OIDC token theft. Defenders should prioritize verifying the integrity of their Helm Charts and ensuring that workflows are properly configured to prevent cache poisoning and OIDC token theft. This vulnerability has a CVSS score of 6.9 and a severity of MEDIUM.

• Cache poisoning can lead to execution of malicious code during release or publish workflows
• OIDC token theft can grant attacker-controlled code access to base repository secrets and tokens
• Verification of workflow configuration and cache storage is necessary to prevent potential attacks
• Remediation priority is high due to potential for exploitation

Technical summary

The pull_request_target workflow in CloudPirates Open Source Helm Charts is vulnerable to cache poisoning and OIDC token theft. The workflow checks out fork code using github.event.pull_request.head.sha or .head.ref, giving attacker-controlled code access to base repository secrets and tokens. The workflow also writes to a shared Actions cache, which can be poisoned and executed during a subsequent release or publish workflow.

Defensive priority

Defenders should prioritize verifying the integrity of their Helm Charts and ensuring that workflows are properly configured to prevent cache poisoning and OIDC token theft.

Recommended defensive actions

• Verify the integrity of Helm Charts and ensure that workflows are properly configured to prevent cache poisoning and OIDC token theft.
• Review and update workflows to use secure practices, such as validating fork code and using secure cache storage.
• Monitor for suspicious activity and implement compensating controls to detect and prevent potential attacks.
• 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.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the vulnerability, including the affected product, versions, and references to additional information. The vulnerability in CloudPirates Open Source Helm Charts allows for cache poisoning and OIDC token theft due to a pull_request_target workflow checking out fork code using github.event.pull_request.head.sha or .head.ref, giving attacker-controlled code access to base repository secrets and tokens. The workflow also writes to a shared Actions cache, which can be poisoned and executed

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.