CVE-2026-71195

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-21 · updated 2026-10-27
Weakness: CWE-863

Description

In OpenStack Manila before 23.0.1, multiple Manila API operations on public shares do not verify that the caller owns the share. The API controllers authorize operations against the caller's own project context, then load a foreign public share without re-authorizing against the share's actual owner. This affects the following operations: allow_access: grant data-plane read/write access to another tenant's share; deny_access: revoke the owner's existing access rules; update_access: escalate access level (e.g., ro to rw); create_share_backup: exfiltrate share data via a backup created under the attacker's project; soft_delete: move a foreign share to the recycle bin; restore: interfere with the owner's deletion workflow; export location metadata: create, update, and delete metadata on foreign export locations; access rule listing: disclose IPs, usernames, and CephFS keys. Any authenticated project member can exploit these operations on any public share. The share UUID is visible since the share is public.

Affected products

OpenStack Manila: from 1.0.0 before 20.0.3; from 21.0.0 before 21.0.3; from 22.0.0 before 22.0.2; from 23.0.0 before 23.0.1 — fixed in 20.0.3, 21.0.3, 22.0.2, 23.0.1

How to fix

Upgrade to a fixed version: OpenStack Manila 20.0.3, 21.0.3, 22.0.2, 23.0.1. Check the vendor advisory for mitigations.

References

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