Sign in Sign up
JA · EN · FR
SecPulse
Categories
CVE-2026-106455 high CVSS 7.7

SSRF (Server-Side Request Forgery) in @backstage/plugin-techdocs-node (CVE-2026-106455)

Summary

SSRF in @backstage/plugin-techdocs-node (CVE-2026-106455). Confidential information can be exposed externally. Exploitable via dangerouslyAllowAdditionalPlugins. Mitigation: upgrade to 1.15.5 or later.

Original description

The description as published by the source.

Impact

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.

Patches

Upgrade @backstage/plugin-techdocs-node to a patched version for the applicable release line:

The update removes MkDocs plugins outside the built-in allowlist. To retain additional plugins, review them and configure techdocs.generator.mkdocs.dangerouslyAllowAdditionalPlugins, or supply dangerouslyAllowAdditionalPlugins when creating the generator directly. Plugins supplied through defaultPlugins remain permitted.

Workarounds

  • Restrict control of TechDocs source repositories and catalog registration to trusted maintainers.
  • Run documentation builders with outbound access to private and link-local networks den…

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-2026-106455 has been found in @backstage/plugin-techdocs-node.
Attackers can target a specific entry point like dangerouslyAllowAdditionalPlugins over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.7/10.
What to do: upgrade @backstage/plugin-techdocs-node to 1.15.5 or later.
If unsure, ask your IT team or search "@backstage/plugin-techdocs-node CVE-2026-106455" on the vendor's site.

CVE-2026-106455 (@backstage/plugin-techdocs-node) — CWE-918 / CVSS v3 7.7
Attack vector: remote (network-reachable) / no user interaction
Attack surface: dangerouslyAllowAdditionalPlugins / defaultPlugins
Patched: 1.15.5 — apply immediately
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.

❓ What is the problem

SSRF (CWE-918) exists in @backstage/plugin-techdocs-node. Attackers reach the vulnerable code path via dangerouslyAllowAdditionalPlugins.

📍 Affected scope

Check the vendor advisory for the affected versions of @backstage/plugin-techdocs-node. Attack surface: dangerouslyAllowAdditionalPlugins / defaultPlugins.

🔥 Severity

Severity: High (CVSS 7.7/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 1.15.5.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

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

  1. 1
    Identify 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。

  2. 2
    Apply patch patch 
    Upgrade @backstage/plugin-techdocs-node to 1.15.5

    ステージング環境で 1.15.5 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。

  3. 3
    Post-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

npm @backstage/plugin-techdocs-node
[{"type":"SEMVER","events":[{"introduced":"1.15.0"},{"fixed":"1.15.5"}]}]

References

We use cookies for analytics and ad measurement. This setting applies to all Game co., Ltd. sites. Details