GHSA-p75x-jh7p-ppcx

Suggest an improvement
Source
https://github.com/advisories/GHSA-p75x-jh7p-ppcx
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p75x-jh7p-ppcx/GHSA-p75x-jh7p-ppcx.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-p75x-jh7p-ppcx
Aliases
Published
2026-10-07T16:23:52Z
Modified
2026-10-07T16:30:05Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L CVSS Calculator
Summary
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
Details

Impact

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.

Patches

Patched in@backstage/plugin-techdocs-node version 1.15.4

Workarounds

If you cannot upgrade immediately:

  • Use Docker mode with restricted access: Configure TechDocs with runIn: docker instead of runIn: local. This provides container isolation, though it does not fully mitigate the risk.
  • Limit repository write access to trusted parties, since exploitation requires the ability to commit files to a repository with TechDocs enabled.
  • Review incoming changes to MkDocs configuration files as part of your code review process.
Database specific 
{
    "cwe_ids": [
        "CWE-426",
        "CWE-436"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-07T16:23:52Z",
    "nvd_published_at": "2026-10-06T22:17:05Z",
    "severity": "HIGH"
}
References

Affected packages

npm / @backstage/plugin-techdocs-node

Package

Name
@backstage/plugin-techdocs-node
View open source insights on deps.dev
Purl
pkg:npm/%40backstage/plugin-techdocs-node

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.15.4

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p75x-jh7p-ppcx/GHSA-p75x-jh7p-ppcx.json"