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.
References (4)
Core 4
Core References
Issue Tracking issue-tracking
https://bugs.launchpad.net/bugs/2150132
Scores
CVSS v4
5.3
EPSS
0.0025
EPSS Percentile
15.6%
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (3)
OpenStack/Neutron
26.0.0 - 26.0.4
OpenStack/Neutron
27.0.0 - 27.0.3
OpenStack/Neutron
28.0.0 - 28.0.1
Published
May 28, 2026
Tracked Since
May 29, 2026