Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build documentation locally or in a container, a user with write access to a registered repository can include configuration values in mkdocs.yml that cause arbitrary code execution during the documentation build process. This issue is fixed in versions 1.14.6 and 1.15.4.
References
| Link | Resource |
|---|---|
| https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb | Exploit Patch |
| https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d | Exploit Patch |
| https://github.com/backstage/backstage/releases/tag/v1.50.5 | Release Notes |
| https://github.com/backstage/backstage/releases/tag/v1.54.6 | Release Notes |
| https://github.com/backstage/backstage/security/advisories/GHSA-8w7q-29mw-gf5c | Vendor Advisory Mitigation |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
09 Oct 2026, 17:34
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linuxfoundation backstage Plugin-techdocs-node
Linuxfoundation Linuxfoundation backstage |
|
| CPE | cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:* |
|
| References | () https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb - Exploit, Patch | |
| References | () https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d - Exploit, Patch | |
| References | () https://github.com/backstage/backstage/releases/tag/v1.50.5 - Release Notes | |
| References | () https://github.com/backstage/backstage/releases/tag/v1.54.6 - Release Notes | |
| References | () https://github.com/backstage/backstage/security/advisories/GHSA-8w7q-29mw-gf5c - Vendor Advisory, Mitigation |
06 Oct 2026, 22:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-06 22:17
Updated : 2026-10-09 17:34
NVD link : CVE-2026-106509
Mitre link : CVE-2026-106509
CVE.ORG link : CVE-2026-106509
JSON object : View
Products Affected
linuxfoundation
- backstage_plugin-techdocs-node
- backstage