CVE-2026-96626 getarcaneapp CVE debrief

Who should care

Defenders responsible for managing Docker containers and images using Arcane, as well as those with access to registries:update and registries:test permissions, should assess their exposure to this vulnerability and take necessary actions to protect their systems.

Why it matters

CVE-2026-96626 is a high-severity vulnerability in the Arcane interface for Docker container management. It allows an attacker to change the registry URL and potentially expose stored container-registry credentials, enabling unauthorized access or tampering with container images. Defenders should verify their exposure, assess the impact, and update to version 2.5.0 or later if necessary.

• Potential exposure of container-registry credentials
• Possible unauthorized access to container images
• Potential tampering with container images
• Verification of Arcane version and exposure required

Technical summary

The Arcane interface for managing Docker containers, images, networks, and volumes has a vulnerability prior to version 2.5.0. The UpdateRegistry and TestRegistry functions in container_registry_service.go allow the registry URL to change while preserving the stored encrypted token. This can lead to the exposure of the stored container-registry PAT or password when a holder of registries:update and registries:test permissions repoints a generic registry URL without supplying a replacement token.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their systems, especially those using Arcane for Docker container management.

Recommended defensive actions

• Verify if the Arcane version in use is prior to 2.5.0 and update to 2.5.0 or later if necessary
• Assess the exposure of container-registry credentials and consider rotating them
• Review and restrict access to registries:update and registries:test permissions
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and source references indicate that Arcane versions prior to 2.5.0 are vulnerable to an issue where the registry URL can be changed while preserving the stored encrypted token, potentially exposing the stored container-registry PAT or password.

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.