CVE-2026-49299 json
OpenStack Neutron has an Incorrect Authorization issue
published 2026-05-28 5 mo ago modified 2026-07-21 3 mo ago also GHSA-xv24-hxh9-2hh9 , PYSEC-2026-2678 , EUVD-2026-33074
- cvss
- 5.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi neutron 26.0.4, 27.0.3, 28.0.1
- OpenStack Neutron 26.0.4, 27.0.3, 28.0.1
- neutron Debian 13 2:26.0.0-9+deb13u1
- neutron Debian 14 2:28.0.0-4
debian advisories DEBIAN-CVE-2026-49299
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-49299 updated cvss 4.3
openstack-neutron: OpenStack Neutron: Unauthorized tag modification due to policy enforcement mismatch
-
Red Hat OpenStack Platform 16.2 python3-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-linuxbridge, +4 more Red Hat OpenStack Platform 17.1 python3-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-bgp-dragent, +7 more Red Hat OpenStack Platform 18.0 openstack-neutronaffected: workaround, no fix available “Fix deferred”
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | 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 |
| CNA | 4.0 | 5.3 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | neutron | >=28.0.0, <28.0.1 >=27.0.0, <27.0.3 >=26.0.0, <26.0.4 |
28.0.1 27.0.3 26.0.4 |
Affected products
- OpenStack Neutron
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
review.opendev.org
/c/openstack/neutron/+/989099
patch, web
-
bugs.launchpad.net
/bugs/2150132
issue-tracking, web
-
openwall.com
/lists/oss-security/2026/05/28/8
web
-
openwall.com
/lists/oss-security/2026/06/02/7
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-49299
advisory
-
github.com
/openstack/neutron
package
-
pypi.org
/project/neutron
package
-
github.com
/advisories/GHSA-xv24-hxh9-2hh9
advisory
Sources
- CVE List CVE-2026-49299
- GitHub Advisory GHSA-xv24-hxh9-2hh9
- NVD CVE-2026-49299
- OSV PYSEC-2026-2678
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