CVE•Published 2026-10-07•Modified 2026-10-13•0 articles on news•4 live references•NVD data

CVE-2026-106556Linuxfoundation · Backstage

Vulnerability data via NVD (ingested)

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

EPSS percentile

Exploit Prediction Scoring System · top 83% of all CVEs

Weaknesses (CWE)

CWE-78Improper Neutralization of Special Elements used in an OS Command CWE-184Incomplete List of Disallowed Inputs

Description

Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.

Timeline

Published 2026-10-07

Modified 2026-10-13

External references

NVD MITRE GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-106556

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Linuxfoundation Backstage"

All exposed Linuxfoundation Backstage instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Backstage"

HTTP body or banner mentions "Backstage" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-106556