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Description

In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.

PUBLISHED Reserved 2026-05-28 | Published 2026-05-28 | Updated 2026-06-02 | Assigner mitre




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-863 Incorrect Authorization

Product status

Default status
unaffected

26.0.0 (semver) before 26.0.4
affected

27.0.0 (semver) before 27.0.3
affected

28.0.0 (semver) before 28.0.1
affected

References

www.openwall.com/lists/oss-security/2026/06/02/7

bugs.launchpad.net/bugs/2150132 issue-tracking

review.opendev.org/c/openstack/neutron/+/989099 patch

www.openwall.com/lists/oss-security/2026/05/28/8

cve.org (CVE-2026-49299)

nvd.nist.gov (CVE-2026-49299)

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