CVE-2026-42999
highpriority · track · 35OT risk · elevatedEPSS 0.004 · 36 %ileEUUSEPSS · scored 2026-10-24
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6–8.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- GHSA-2r23-2g6v-2m5fOpenStack Keystone has an Authorization Bypass2026-05-28ghsa · osvUS
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
- PYSEC-2026-6002026-05-28vendor · osvUS
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://bugs.launchpad.net/keystone/+bug/2148398cnnvd
- https://security.openstack.org/ossa/OSSA-2026-015.htmlcnnvd
- https://bugs.launchpad.net/keystone/+bug/2148398enisa_euvd
- https://security.openstack.org/ossa/OSSA-2026-015.htmlenisa_euvd
- https://access.redhat.com/security/cve/CVE-2026-42999nvd
- https://bugs.launchpad.net/keystone/+bug/2148398ExploitIssue TrackingPatchThird Party Advisorynvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2482840nvd
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42999.jsonnvd
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