TI-2026-36485 Aliases CVE-2026-49299 GHSA-xv24-hxh9-2hh9

Incorrect authorization in OpenStack Neutron

LOW 24CWE-863Published 2026-05-28 · Updated 2026-06-02

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: Partial Red Hat: 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-863.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00295 22nd percentileScored 2026-11-07

Fix Partial Neutron (OpenStack): 26.0.4, 27.0.3, 28.0.1neutron (PyPI): 28.0.1, 27.0.3, 26.0.4Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenStack	Neutron	26.0.0 to before 26.0.4; 27.0.0 to before 27.0.3; 28.0.0 to before 28.0.1	26.0.4, 27.0.3, 28.0.1	Patch available	CNA
—	neutron (PyPI)	28.0.0 to before 28.0.1	28.0.1	Patch available	GHSA-xv24-hxh9-2hh9
—	neutron (PyPI)	27.0.0 to before 27.0.3	27.0.3	Patch available	GHSA-xv24-hxh9-2hh9
—	neutron (PyPI)	26.0.0 to before 26.0.4	26.0.4	Patch available	GHSA-xv24-hxh9-2hh9

Neutron VendorOpenStack Affected 26.0.0 to before 26.0.4; 27.0.0 to before 27.0.3; 28.0.0 to before 28.0.1 Fixed in 26.0.4, 27.0.3, 28.0.1 Patch available CNA
neutron (PyPI) Vendor— Affected 28.0.0 to before 28.0.1 Fixed in 28.0.1 Patch available GHSA-xv24-hxh9-2hh9
neutron (PyPI) Vendor— Affected 27.0.0 to before 27.0.3 Fixed in 27.0.3 Patch available GHSA-xv24-hxh9-2hh9
neutron (PyPI) Vendor— Affected 26.0.0 to before 26.0.4 Fixed in 26.0.4 Patch available GHSA-xv24-hxh9-2hh9

Remediation

Fix · CNA Neutron (OpenStack) Fixed in 26.0.4, 27.0.3, 28.0.1
Fix · GHSA-xv24-hxh9-2hh9 neutron (PyPI) Fixed in 28.0.1 Advisory →
Fix · GHSA-xv24-hxh9-2hh9 neutron (PyPI) Fixed in 27.0.3 Advisory →
Fix · GHSA-xv24-hxh9-2hh9 neutron (PyPI) Fixed in 26.0.4 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenStack Platform 16.2	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 17.1	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 18.0	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-49299
2026-10-03 Alias added: GHSA-xv24-hxh9-2hh9

References

Patch 1

https://review.opendev.org/c/openstack/neutron/+/989099

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-49299

Other 4

TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8

See all 332 →

Sources

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