CVE-2026-106498— Backstage: Improper URL validation in catalog entity placeholder resolution
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。在版本 3.5.1、3.6.2、3.7.2、3.8.2 和 3.9.1 之前，@backstage/plugin-catalog-backend 包在目录实体占位符解析过程中存在不正确的 URL 验证问题。经过身份验证的 Backstage 用户可以构造一个包含占位符指令的目录实体，这些指令引用该实体源代码仓库之外的资源。在某些配置下，这可能导致用户访问到本不应向其公开的数据。该问题已在版本 3.5.1、3.6.2、3.7.2、3.8.2 和 3.9.1 中得
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-106498
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Backstage: Improper URL validation in catalog entity placeholder resolution
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. An authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.49.6 | - |
|
| @backstage | plugin-catalog-backend | < 3.5.1 | - |
|
II. Public POCs for CVE-2026-106498
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-106498
请登录查看更多情报信息。
Vendor Pages for CVE-2026-106498 (2)
-
🔗 Release v1.50.5 · backstage/backstage · GitHub x_refsource_MISC
-
🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
Other References for CVE-2026-106498 (9)
-
https://github.com/backstage/backstage/releases/tag/v1.49.6 x_refsource_MISC
-
https://github.com/backstage/backstage/releases/tag/v1.53.2 x_refsource_MISC
-
https://github.com/backstage/backstage/releases/tag/v1.51.3 x_refsource_MISC
-
https://github.com/backstage/backstage/security/advisories/GHSA-qgvj-qcf8-xq73 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-2026-106500 | 8.5 HIGH | Backstage: Improper task state validation in Scaffolder backend |
| CVE-2026-106459 | 8.5 HIGH | Backstage: Improper input validation in Sentry scaffolder actions |
| 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-2026-106509 | 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 |
| CVE-2026-106506 | 5.3 MEDIUM | Backstage: Improper input validation in scaffolder task list ordering |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: backstage
-
CVE-2026-106509
Backstage: Improper validation of MkDocs theme configuration -
CVE-2026-106508
Backstage: Potential file exposure through local TechDocs pu -
CVE-2026-106507
Backstage: TechDocs arbitrary file read via mkdocs snippets -
CVE-2026-106506
Backstage: Improper input validation in scaffolder task list -
CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechD
Same vendor: backstage
-
CVE-2026-106509
Backstage: Improper validation of MkDocs theme configuration -
CVE-2026-106508
Backstage: Potential file exposure through local TechDocs pu -
CVE-2026-106507
Backstage: TechDocs arbitrary file read via mkdocs snippets -
CVE-2026-106506
Backstage: Improper input validation in scaffolder task list -
CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechD
Same weakness: CWE-863
-
CVE-2026-89182
Gitea push-to-create bypass of FORCE_PRIVATE policy -
CVE-2026-97208
Gitea push mirror API bypass of DISABLE_NEW_PUSH policy -
CVE-2026-86684
Gitea push mirror local path check uses the repository owner -
CVE-2026-106463
Backstage: Improper authorization in GitLab organizational u -
CVE-2026-106461
Backstage: Incorrect authorization in scaffolder task listin
V. Comments for CVE-2026-106498
No comments yet