要点
- CVE-2026-106557 は @backstage/plugin-techdocs-node に影響する深刻度「高」 (CVSS 7.7) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.38%（全脆弱性の 31.5% より高い）。
- 対処：1.15.4 以降に更新してください。
概要
Impact
An authenticated user who can register or modify documentation sources may cause a TechDocs build to access resources outside the intended documentation boundary. Depending on deployment configuration, this may expose sensitive backend-host data or internal network resources.
Patches
Patched in @backstage/plugin-techdocs-node version 1.15.4.
Adopters must also use pymdown-extensions version 10.21.3 or newer, normally through mkdocs-techdocs-core version 1.7.0 or newer. @backstage/plugin-techdocs-node does not control the Python dependencies used by the generator; with an older PyMdown release, snippets may remain vulnerable to file inclusion even after their configuration is sanitized.
Workarounds
- Generate TechDocs only from trusted repositories with reviewed MkDocs configuration.
- Use isolated build environments with restricted filesystem access and network egress.
- Prefer externally generated TechDocs with appropriately sandboxed CI.
NVD の説明
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package did not sufficiently validate TechDocs Markdown extension configuration. An authenticated user who can register or modify documentation sources may cause a TechDocs build to access resources outside the intended documentation boundary, potentially exposing backend-host data or internal network resources. This issue is fixed in versions 1.14.6 and 1.15.4 when pymdown-extensions 10.21.3 or later is also used, normally through mkdocs-techdocs-core 1.7.0 or later.
@backstage/plugin-techdocs-node のその他の脆弱性
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