CVE-2026-106455Backstage: Improper validation of MkDocs plugin configuration in TechDocs
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 0.33%, higher than 25% of scored CVEs.
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Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.
- CVSS
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.33% (percentile 25)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
backstage backstage backstage:backstage (from the name) | from 0.71.1, < 1.50.6; from 1.51.0-next.0, < 1.54.8 | CNA record |
@backstage plugin-techdocs-node backstage:plugin_techdocs_node (from the name) | from 0.11.12, < 1.14.7; from 1.15.0, < 1.15.5 | CNA record |
linuxfoundation backstage_plugin-techdocs-node linuxfoundation:backstage_plugin-techdocs-node | from 0.11.12 before 1.14.7; from 1.15.0 before 1.15.5 | NVD |
linuxfoundation backstage linuxfoundation:backstage | from 0.71.1 before 1.50.6; from 1.51.1 before 1.54.8; 1.51.0; 1.51.0; 1.51.0; 1.51.0; 1.51.0 | NVD |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5mx-refsource-confirm, mitigation, vendor-advisory
- https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71bx-refsource-misc, patch
- https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0x-refsource-misc, patch
- https://github.com/backstage/backstage/releases/tag/v1.50.6x-refsource-misc, patch, release-notes
- https://github.com/backstage/backstage/releases/tag/v1.54.8x-refsource-misc, patch, release-notes
- https://github.com/backstage/backstage/releases/tag/v1.55.0x-refsource-misc, release-notes, vendor-advisory
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.