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CVE-2026-49299

25
FAUCET Score

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.

First published: May 28, 2026Last modified: May 28, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 26.0.0, < 26.0.4CPE match
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
>= 27.0.0, < 27.0.3CPE match
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
>= 28.0.0, < 28.0.1CPE match
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.3MEDIUM

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 28th percentile among its peer group of 21,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

pippatch availablevia ghsa
Product: neutronFixed in: 28.0.1
pippatch availablevia ghsa
Product: neutronFixed in: 27.0.3
pippatch availablevia ghsa
Product: neutronFixed in: 26.0.4

Vendor Advisories (1)

pipGHSA-xv24-hxh9-2hh9medium

OpenStack Neutron has an Incorrect Authorization issue

May 29, 2026

References

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