CVE-2026-106556Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
Updated under an hour ago ()
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It affects backstage and 3 other products. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.26%, higher than 16% of scored CVEs.
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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.
- CVSS
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
- Weakness (CWE)
- CWE-78, CWE-184
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.26% (percentile 16)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
backstage backstage backstage:backstage (from the name) | before 1.50.5; from 1.51.0-next.0, < 1.54.6 | CNA record |
@backstage plugin-techdocs-node backstage:plugin_techdocs_node (from the name) | before 1.14.6; from 1.15.0, < 1.15.4 | CNA record |
linuxfoundation backstage linuxfoundation:backstage | before 1.50.5; from 1.51.1 before 1.54.6; 1.51.0; 1.51.0; 1.51.0; 1.51.0; 1.51.0 | NVD |
linuxfoundation backstage_plugin-techdocs-node linuxfoundation:backstage_plugin-techdocs-node | before 1.14.6; from 1.15.0 before 1.15.4 | NVD |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-g2hj-v2j6-vfvgx-refsource-confirm, mitigation, vendor-advisory
- https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26x-refsource-misc, patch
- https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677ax-refsource-misc, patch
- https://github.com/backstage/backstage/releases/tag/v1.50.5x-refsource-misc, patch, release-notes
- https://github.com/backstage/backstage/releases/tag/v1.54.6x-refsource-misc, patch, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.