CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
Description
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
INFO
Published Date :
Oct. 6, 2026, 10:17 p.m.
Last Modified :
Oct. 9, 2026, 5:58 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-106505
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update @backstage/plugin-techdocs-node to version 1.14.6 or later.
- Update @backstage/plugin-techdocs-node to version 1.15.4 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-106505.
| URL | Resource |
|---|---|
| https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9 | Patch |
| https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db | Patch |
| https://github.com/backstage/backstage/releases/tag/v1.50.5 | Patch Release Notes |
| https://github.com/backstage/backstage/releases/tag/v1.54.6 | Patch Release Notes |
| https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx | Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-106505 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-106505
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-106505 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-106505 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.6 *cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:* versions from (including) 1.15.0 up to (excluding) 1.15.4 Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* versions up to (excluding) 1.50.5 *cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* versions from (including) 1.51.1 up to (excluding) 1.54.6 *cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:* *cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:* *cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:* *cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:* *cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:* Added Reference Type GitHub, Inc.: https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db Types: Patch Added Reference Type GitHub, Inc.: https://github.com/backstage/backstage/releases/tag/v1.50.5 Types: Patch, Release Notes Added Reference Type GitHub, Inc.: https://github.com/backstage/backstage/releases/tag/v1.54.6 Types: Patch, Release Notes Added Reference Type GitHub, Inc.: https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx Types: Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 07, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-106505', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-10-07T16:12:41.246162Z'} -
New CVE Received by [email protected]
Oct. 06, 2026
Action Type Old Value New Value Added Description Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L Added CWE CWE-426 Added CWE CWE-436 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/106xxx/CVE-2026-106505.json">CVE-2026-106505</a> Added Reference https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9 Added Reference https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db Added Reference https://github.com/backstage/backstage/releases/tag/v1.50.5 Added Reference https://github.com/backstage/backstage/releases/tag/v1.54.6 Added Reference https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx