CVE-2026-106510 | BDVDB-2026-384302 Detail

backstagebackstage

Description#

Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact low, availability impact low. Attack vector: network.

Weaknesses#

CWE-183 Permissive List of Allowed Inputs
CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

References#

Exploit#

No public exploit known

History#

Version 12026-10-07Record published in the CVE List.

Published

Published: 2026-10-07
Last modified: 2026-10-07

Vendor information

Vendor: backstage
Product: backstage

All backstage vulnerabilities

Score

7.7 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 41.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 1.50.5
Fixed
Not stated
Vulnerable
>= 1.51.0-next.0, < 1.54.6
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.7 High

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	Low
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	Low
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).