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CVE-2026-49299

MEDIUM
5.3
CVSS Score
Published: May 28, 2026 at 09:53 PM UTC
Updated: July 21, 2026 at 10:29 AM UTC
1 product affected across 1 vendorNeutron

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Neutron· Openstack
95%
26.0.0 ≤ v < 26.0.427.0.0 ≤ v < 27.0.328.0.0 ≤ v < 28.0.126.0.027.0.028.0.0
Affected range stops below 26.0.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 27.0.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 28.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Issue Tracking
Source: cverecord
https://bugs.launchpad.net/bugs/2150132
Patch
Source: cverecord
https://review.opendev.org/c/openstack/neutron/+/989099
Source: cverecord
https://www.openwall.com/lists/oss-security/2026/05/28/8
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/06/02/7

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMmitre
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-863

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