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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenStack | Neutron | 26.0.0 – < 26.0.4, 27.0.0 – < 27.0.3, 28.0.0 – < 28.0.1 | 26.0.4 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | neutron | 2:28.0.0-4 | — |
| Debian 13 | neutron | 2:26.0.0-9+deb13u1 | — |
| Debian 12 | neutron | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | neutron | No fix yet | — |
| Ubuntu 26.04 LTS | neutron | No fix yet | — |
| Ubuntu 25.10 | neutron | No fix yet | — |
| Ubuntu 24.04 LTS | neutron | No fix yet | — |
| Ubuntu 22.04 LTS | neutron | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | neutron | No fix yet | — |
| Ubuntu 18.04 LTS | neutron | No fix yet | — |
| Ubuntu 16.04 LTS | neutron | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | neutron | >= 28.0.0, < 28.0.1 | 28.0.1 | GHSA-xv24-hxh9-2hh9 |
| PyPI | neutron | >= 27.0.0, < 27.0.3 | 27.0.3 | GHSA-xv24-hxh9-2hh9 |
| PyPI | neutron | >= 26.0.0, < 26.0.4 | 26.0.4 | GHSA-xv24-hxh9-2hh9 |
| PyPI | neutron | >= 26.0.0, < 26.0.4 · >= 27.0.0, < 27.0.3 · >= 28.0.0, < 28.0.1 | 26.0.4, 27.0.3, 28.0.1 | PYSEC-2026-2678 |