Vulnerability · Published May 28, 2026 · Assigned by mitre
CVE-2026-49299
Medium 5.3
In plain English
A medium-severity incorrect authorization in Neutron from OpenStack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | neutron | no fix listed | DEBIAN-CVE-2026-49299 |
| Debian:13 | neutron | 2:26.0.0-9+deb13u1 | DEBIAN-CVE-2026-49299 |
| Debian:14 | neutron | 2:28.0.0-4 | DEBIAN-CVE-2026-49299 |
| PyPI | neutron | 26.0.4, 27.0.3, 28.0.1 | PYSEC-2026-2678 |
| PyPI | neutron | 28.0.1 | GHSA-xv24-hxh9-2hh9 |
| PyPI | neutron | 27.0.3 | GHSA-xv24-hxh9-2hh9 |
| PyPI | neutron | 26.0.4 | GHSA-xv24-hxh9-2hh9 |
| Ubuntu:22.04:LTS | neutron | no fix listed | UBUNTU-CVE-2026-49299 |
| Ubuntu:24.04:LTS | neutron | no fix listed | UBUNTU-CVE-2026-49299 |
| Ubuntu:25.10 | neutron | no fix listed | UBUNTU-CVE-2026-49299 |
| Ubuntu:26.04:LTS | neutron | no fix listed | UBUNTU-CVE-2026-49299 |
| Ubuntu:26.10 | neutron | no fix listed | UBUNTU-CVE-2026-49299 |
Affected products (as reported)
Weakness: CWE-863 · Vector: 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