Path Traversal in @backstage/plugin-techdocs-node (CVE-2026-106508)
Summary
Path traversal in @backstage/plugin-techdocs-node (CVE-2026-106508). Confidential information can be exposed externally. Exploitable via awsS3. Mitigation: upgrade to 1.15.4 or later.
Original description
The description as published by the source.
Impact
When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users.
This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected.
Patches
Patched in @backstage/plugin-techdocs-node version 1.15.4
Workarounds
If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g. awsS3, googleGcs, or azureBlobStorage publishers)
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-106508 has been found in @backstage/plugin-techdocs-node.
Attackers can target a specific entry point like awsS3 over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 5.3/10.
What to do: upgrade @backstage/plugin-techdocs-node to 1.15.4 or later.
If unsure, ask your IT team or search "@backstage/plugin-techdocs-node CVE-2026-106508" on the vendor's site.
CVE-2026-106508 (@backstage/plugin-techdocs-node) — CWE-22 / CVSS v3 5.3
Attack vector: remote (network-reachable) / no user interaction
Attack surface: awsS3 / googleGcs / azureBlobStorage
Patched: 1.15.4 — apply immediately
Workaround: If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Path traversal (CWE-22) exists in @backstage/plugin-techdocs-node. Attackers reach the vulnerable code path via awsS3.
Check the vendor advisory for the affected versions of @backstage/plugin-techdocs-node. Attack surface: awsS3 / googleGcs / azureBlobStorage.
Severity: Medium (CVSS 5.3/10). Confidential information can be exposed externally.
Update to 1.15.4.
Workaround: If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r '@backstage/plugin-techdocs-node' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r '@backstage/plugin-techdocs-node' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
@backstage/plugin-techdocs-nodeを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g.パッチが適用されるまでの応急処置として、If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g. を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade @backstage/plugin-techdocs-node to 1.15.4ステージング環境で 1.15.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- patch security-advisories@github.com
- patch security-advisories@github.com
- patch security-advisories@github.com
- web nvd.nist.gov
- web github.com