CVE-2026-106496— Backstage: Inconsistent enforcement of allowed location types during catalog processing
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放框架。在版本 3.9.1 之前， 包在处理目录（catalog）时，对允许的位置类型（location types）的执行存在不一致的问题。在某些配置下，目录后端可能会处理原本不应被允许的位置类型，这可能导致在后端主机上发生非预期的文件访问。该问题已在 3.9.1 版本中修复。
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I. Basic Information for CVE-2026-106496
Vulnerability Information
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Vulnerability Title
Backstage: Inconsistent enforcement of allowed location types during catalog processing
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent enforcement of allowed location types during catalog processing. Under certain configurations, the catalog backend could process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. This issue is fixed in version 3.9.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.54.6 | - |
|
| @backstage | plugin-catalog-backend | < 3.9.1 | - |
|
II. Public POCs for CVE-2026-106496
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-106496 (1)
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🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
Other References for CVE-2026-106496 (2)
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https://github.com/backstage/backstage/security/advisories/GHSA-pcmq-25r3-5w9v x_refsource_CONFIRM
Same Patch Batch · backstage · 2026-10-06 · 32 CVEs total
| CVE-2026-106501 | 9.6 CRITICAL | Backstage: Sensitive information exposure in Scaffolder |
| CVE-2026-106459 | 8.5 HIGH | Backstage: Improper input validation in Sentry scaffolder actions |
| CVE-2026-106500 | 8.5 HIGH | Backstage: Improper task state validation in Scaffolder backend |
| CVE-2026-106486 | 8.5 HIGH | Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions |
| CVE-2026-106503 | 8.1 HIGH | Backstage: Scaffolder action input authorization bypass |
| CVE-2026-106488 | 8.1 HIGH | Backstage: Improper authentication in the OIDC provider |
| CVE-2026-106455 | 7.7 HIGH | Backstage: Improper validation of MkDocs plugin configuration in TechDocs |
| CVE-2026-106498 | 7.7 HIGH | Backstage: Improper URL validation in catalog entity placeholder resolution |
| CVE-2026-106509 | 7.7 HIGH | Backstage: Improper validation of MkDocs theme configuration in TechDocs |
| CVE-2026-106505 | 7.7 HIGH | Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend |
| CVE-2026-106492 | 7.6 HIGH | Backstage: Improper preservation of access restrictions during service credential delegati |
| CVE-2026-106460 | 6.8 MEDIUM | Backstage: Explicit negative email verification can be ignored during shared OAuth profile |
| CVE-2026-106457 | 6.8 MEDIUM | Backstage: Insufficient audience validation in the Cloudflare Access auth provider |
| CVE-2026-106490 | 6.5 MEDIUM | Backstage: Improper input validation in TechDocs static content requests |
| CVE-2026-106489 | 6.5 MEDIUM | Backstage: Improper authorization enforcement for TechDocs static content |
| CVE-2026-106458 | 6.5 MEDIUM | Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates |
| CVE-2026-106504 | 6.5 MEDIUM | Backstage: Sensitive information exposure in scaffolder task logs |
| CVE-2026-106491 | 6.4 MEDIUM | Backstage: Improper input validation in proxy-backend |
| CVE-2026-106462 | 6.4 MEDIUM | Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallb |
| CVE-2026-106463 | 5.4 MEDIUM | Backstage: Improper authorization in GitLab organizational user ingestion |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same weakness: CWE-22
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V. Comments for CVE-2026-106496
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