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TI-2026-69625 Aliases CVE-2026-93861GHSA-p254-mh9p-hpfm

Incorrect authorization in OpenStack Mistral exposes shared workflows

Priority LOW 26CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-863.

Summary

OpenStack Mistral before 20.1.1, from 21.0.0 before 21.0.1, from 22.0.0 before 22.0.1, and from 23.0.0 is affected. The membership API assigns new memberships to the accepting project instead of the workflow owner, so the owner cannot see or delete them (CWE-863). A remote authenticated user of a project that has accepted a shared private workflow can create a membership naming a third project, which can then accept it and read and execute the owner's workflow.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

In OpenStack Mistral through 23.0.0, the workflow membership API lets a project that has accepted a share of another project's private workflow create a further membership naming a third project. The new membership row is created with its project_id defaulted to the accepting project rather than the original workflow owner, and thus the owner can neither see nor delete it. The third project can accept this membership (that it had not actually been granted by the owner), and then read and execute the owner's private workflow; only the accepting (not the owning) project can later revoke that access.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00258 17th percentileScored 2026-11-07
Fix Partial Mistral (OpenStack): 20.1.1, 21.0.1, 22.0.1Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenStackMistralbefore 20.1.1; 21.0.0 to before 21.0.1; 22.0.0 to before 22.0.1; 23.0.020.1.1, 21.0.1, 22.0.1Patch availableCNA
  • Mistral VendorOpenStack Affected before 20.1.1; 21.0.0 to before 21.0.1; 22.0.0 to before 22.0.1; 23.0.0 Fixed in 20.1.1, 21.0.1, 22.0.1 Patch available CNA

Remediation

Fixed in OpenStack Mistral 20.1.1, 21.0.1 and 22.0.1, one per release line. The sources list no fixed version for Red Hat OpenStack Platform 13 (Queens), where no fix is planned, or for Red Hat OpenStack Platform 16.2, where none is available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Mistral (OpenStack) Fixed in 20.1.1, 21.0.1, 22.0.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OpenStack Mistral 20.1.1, 21.0.1, 22.0.1

    4 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resourcesPriority HIGH 73
    • TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied actionPriority HIGH 73
    • TI-2026-69624 Missing authorization in OpenStack Mistral maintenance APIPriority MEDIUM 64
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenStack Platform 13 (Queens)AffectedNo fix planned: Out of support scope
Red Hat OpenStack Platform 16.2AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-08 Threatist record created from CVE-2026-93861
  2. 2026-10-09 Alias added: GHSA-p254-mh9p-hpfm
  3. 2026-10-09 Affected versions changed · Red Hat
  4. 2026-10-09 CVSS score added · Red Hat
  5. 2026-10-10 Priority changed: MEDIUM → LOW
  6. 2026-10-16 CISA SSVC decision points changed

References

Other 2

  • TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
  • TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
  • TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
  • TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
  • TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
  • TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8
See all 332 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences