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CVE-2026-49299

Quick assessment

Affected
OpenStack Neutron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenStack Neutron是OpenStack开源的一个 OpenStack 项目，旨在为其他 OpenStack 服务管理的接口设备之间提供服务。 OpenStack Neutron 28.0.1之前版本存在安全漏洞，该漏洞源于标记控制器在单标签写操作上强制执行复数策略操作名称，而定义的策略规则使用单数名称，名称不匹配在默认策略下评估为允许，可能导致项目读者在相同项目资源上创建和更新标签。

AI Predicted 8.8 Difficulty: Easy EPSS 0.29% · P22

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 3

VendorProduct Version RangeStatus
OpenStack Neutron 26.0.0< 26.0.4 affected
27.0.0< 27.0.3 affected
28.0.0< 28.0.1 affected
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I. Basic Information for CVE-2026-49299

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenStack Neutron 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenStack Neutron是OpenStack开源的一个 OpenStack 项目，旨在为其他 OpenStack 服务管理的接口设备之间提供服务。 OpenStack Neutron 28.0.1之前版本存在安全漏洞，该漏洞源于标记控制器在单标签写操作上强制执行复数策略操作名称，而定义的策略规则使用单数名称，名称不匹配在默认策略下评估为允许，可能导致项目读者在相同项目资源上创建和更新标签。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenStack Neutron 26.0.0 ~ 26.0.4 -

II. Public POCs for CVE-2026-49299

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III. Intelligence Information for CVE-2026-49299

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Patches & Fixes for CVE-2026-49299 (1)

Vendor Advisories for CVE-2026-49299 (1)

Mailing List Discussions for CVE-2026-49299 (1)

Same Patch Batch · OpenStack · 2026-05-28 · 5 CVEs total

CVE-2026-42998 6.0 MEDIUM OpenStack Keystone 安全漏洞
CVE-2026-42999 6.0 MEDIUM OpenStack Keystone 安全漏洞
CVE-2026-43000 6.0 MEDIUM OpenStack Keystone 安全漏洞
CVE-2026-44394 6.0 MEDIUM OpenStack Keystone 安全漏洞

IV. Related Vulnerabilities

Same product: Neutron
Same vendor: OpenStack
Same weakness: CWE-863

V. Comments for CVE-2026-49299

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