id: PYSEC-2026-2678
published: "2026-07-13T15:19:13.790301Z"
modified: "2026-07-13T16:05:02.393069Z"
aliases:
- CVE-2026-49299
- GHSA-xv24-hxh9-2hh9
summary: OpenStack Neutron has an Incorrect Authorization issue
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.
affected:
- package:
    name: neutron
    ecosystem: PyPI
    purl: pkg:pypi/neutron
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 26.0.0
    - fixed: 26.0.4
    - introduced: 27.0.0
    - fixed: 27.0.3
    - introduced: 28.0.0
    - fixed: 28.0.1
  versions:
  - 26.0.0
  - 26.0.1
  - 26.0.2
  - 26.0.3
  - 27.0.0
  - 27.0.1
  - 27.0.2
  - 28.0.0
references:
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2026-49299
- type: WEB
  url: https://bugs.launchpad.net/bugs/2150132
- type: PACKAGE
  url: https://github.com/openstack/neutron
- type: WEB
  url: https://review.opendev.org/c/openstack/neutron/+/989099
- type: WEB
  url: https://www.openwall.com/lists/oss-security/2026/05/28/8
- type: WEB
  url: http://www.openwall.com/lists/oss-security/2026/06/02/7
- type: PACKAGE
  url: https://pypi.org/project/neutron
- type: ADVISORY
  url: https://github.com/advisories/GHSA-xv24-hxh9-2hh9
severity:
- type: CVSS_V4
  score: 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