What’s Vulnerable › Vulnerabilities

CVE-2026-49299

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-07-21
• Weakness: CWE-863

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

• OpenStack Neutron: from 26.0.0 before 26.0.4; from 27.0.0 before 27.0.3; from 28.0.0 before 28.0.1 — fixed in 26.0.4, 27.0.3, 28.0.1

How to fix

Upgrade to a fixed version: OpenStack Neutron 26.0.4, 27.0.3, 28.0.1. Check the vendor advisory for mitigations.

References

• https://bugs.launchpad.net/bugs/2150132
• https://review.opendev.org/c/openstack/neutron/+/989099
• https://www.openwall.com/lists/oss-security/2026/05/28/8
• http://www.openwall.com/lists/oss-security/2026/06/02/7

Get alerted when CVE-2026-49299 or the next vulnerability affects your stack