CVE-2026-106495— Backstage: Improper access control in backend action invocation
Quick assessment
Affected
backstage backstage
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.
Backstage 是一个用于构建开发者门户的开源框架。在 0.17.8 版本之前，@backstage/backend-defaults 软件包存在后端操作调用中的访问控制不当问题。经过身份验证的用户可以调用那些已通过操作配置被操作员排除的操作。现有的操作权限以及下游授权仍然会被强制执行。该问题已在 0.17.8 版本中得到修复。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| @backstage | backend-defaults | < 0.17.8 |
affected |
| backstage | backstage | < 1.54.6 |
affected |
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I. Basic Information for CVE-2026-106495
Vulnerability Information
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Vulnerability Title
Backstage: Improper access control in backend action invocation
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.54.6 | - |
|
| @backstage | backend-defaults | < 0.17.8 | - |
|
II. Public POCs for CVE-2026-106495
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-106495 (1)
Vendor Pages for CVE-2026-106495 (1)
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🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
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V. Comments for CVE-2026-106495
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