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TI-2026-63194 Aliases CVE-2026-93854GHSA-4rvg-j972-3xw2

In OpenStack Blazar before 17.0.1, the V2 lease API does not enforce object-level…

Priority LOW 32CWE-1025Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

In OpenStack Blazar before 17.0.1, the V2 lease API does not enforce object-level authorization on its update and delete operations (PUT /v2/leases/{lease_id} and DELETE /v2/leases/{lease_id}). The policy authorize() wrapper attempts to load the target lease to build the authorization target from its owner, but it looks up the lease under the keyword "lease_id" whereas the controller methods name the parameter "id" (and the wsme_pecan.wsexpose wrapper delivers it positionally). The lookup returns None, and thus authorization falls back to the requesting user's own project_id/user_id instead of the target lease owner. Any authenticated user who knows a lease ID can therefore modify or delete leases belonging to other users and projects, bypassing the intended ownership check.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00406 35th percentileScored 2026-11-07
Fix Fixed Blazar (OpenStack): 15.1.1, 16.0.1, 17.0.1

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
OpenStackBlazar1.0.0 to before 15.1.1; 16.0.0 to before 16.0.1; 17.0.0 to before 17.0.115.1.1, 16.0.1, 17.0.1Patch availableCNA
  • Blazar VendorOpenStack Affected 1.0.0 to before 15.1.1; 16.0.0 to before 16.0.1; 17.0.0 to before 17.0.1 Fixed in 15.1.1, 16.0.1, 17.0.1 Patch available CNA

Remediation

  • Fix · CNA Blazar (OpenStack) Fixed in 15.1.1, 16.0.1, 17.0.1

Fixed in the same release

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

  • Release ·

    OpenStack Blazar 15.1.1, 16.0.1, 17.0.1

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-63192 Missing authorization in OpenStack BlazarPriority LOW 31
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93854
  2. 2026-10-03 Alias added: GHSA-4rvg-j972-3xw2

References

Other 1

  • 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