CVE-2026-97147 OpenStack CVE debrief

Who should care

OpenStack Mistral deployment administrators and security teams should assess exposure and prioritize patching to prevent unauthorized modification of public action definitions and environments.

Why it matters

CVE-2026-97147 is a high-severity vulnerability in OpenStack Mistral that allows an authenticated project member to rewrite and un-publish another project's public action definitions and environments. Defenders should prioritize verifying and patching OpenStack Mistral deployments to prevent unauthorized modification of public action definitions and environments. This vulnerability requires verification from the supplied official sources, and its impact and remediation are limited by the available evidence.

• Potential unauthorized modification of public action definitions and environments in OpenStack Mistral deployments.
• Possible disruption of critical workflows and services relying on OpenStack Mistral.
• Need for verification of OpenStack Mistral versions and patch levels to ensure remediation.
• Potential for compromised public action definitions and environments to be used in further attacks.

Technical summary

CVE-2026-97147 is a vulnerability in OpenStack Mistral that allows an authenticated project member to rewrite and un-publish another project's public action definitions and environments. The issue arises from several v2 API write paths that can resolve target objects with queries returning resources from other projects. This enables unauthorized modifications of public action definitions and environments. A project administrator can create workbooks with embedded ad-hoc actions or workflows that collide with resources from another project, relocating those resources into the caller's project.

Defensive priority

Defenders should prioritize verifying and patching OpenStack Mistral deployments to prevent unauthorized modification of public action definitions and environments.

Recommended defensive actions

• Verify and apply OpenStack Mistral patches to prevent unauthorized modification of public action definitions and environments.
• Restrict access to the Mistral API to authenticated project members.
• Monitor for suspicious activity related to public action definitions and environments in OpenStack Mistral deployments.
• 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 in OpenStack Mistral, including its impact on public action definitions and environments. The vulnerability allows an authenticated project member to rewrite and un-publish another project's public action definitions and environments. The issue is limited to deployments exposing the Mistral API. Evidence from official sources indicates that this vulnerability requires verification and has limited impact and remediation. Defenders should verify OpenStack Mistral

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.