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PYSEC-2026-2678

OpenStack Neutron has an Incorrect Authorization issue

Quick fix

PYSEC-2026-2678 — neutron: upgrade to the fixed version with the command below.

pip install --upgrade 'neutron>=26.0.4'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/neutron

Introduced in: 26.0.0Fixed in: 26.0.4

Fixpip install --upgrade 'neutron>=26.0.4'

References

https://nvd.nist.gov/vuln/detail/CVE-2026-49299[ADVISORY]
https://bugs.launchpad.net/bugs/2150132[WEB]
https://github.com/openstack/neutron[PACKAGE]
https://review.opendev.org/c/openstack/neutron/+/989099[WEB]
https://www.openwall.com/lists/oss-security/2026/05/28/8[WEB]
http://www.openwall.com/lists/oss-security/2026/06/02/7[WEB]
https://pypi.org/project/neutron[PACKAGE]
https://github.com/advisories/GHSA-xv24-hxh9-2hh9[ADVISORY]