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CVE-2026-109186 high CVSS 8.8

Vulnerability in jshERP (CVE-2026-109186)

Summary

Vulnerability in jshERP (CVE-2026-109186). Successful exploitation can lead to full system takeover. Exploitable via PUT /user/update.

Original description

The description as published by the source.

jshERP through 3.6 contains a mass assignment vulnerability in the UserController update handler that allows authenticated users to overwrite protected fields including tenant_id and password. Attackers can send a crafted PUT /user/update body to switch into another tenant on next login or overwrite other users' password hashes for account takeover.

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-2026-109186 has been found in jshERP.
Attackers can target a specific entry point like PUT /user/update over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "jshERP CVE-2026-109186" on the vendor's site.

CVE-2026-109186 (jshERP) — CWE-915 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Attack surface: PUT /user/update
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

A vulnerability (CWE-915) exists in jshERP. Attackers reach the vulnerable code path via PUT /user/update.

📍 Affected scope

Check the vendor advisory for the affected versions of jshERP. Attack surface: PUT /user/update.

🔥 Severity

Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ 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 PUT /user/update requests with malformed payloads or SQL meta-characters. Run grep -r 'jshERP' . 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 'jshERP' . | 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 jshERP 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
    Hunt for indicators of compromise detect 
    grep 'PUT /user/update' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'

    アクセスログで PUT /user/update への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。

  3. 3
    Post-deployment verification verify 
    Replay attack against PUT /user/update on staging to confirm patch closes the vector

    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 Step 2 と同じログクエリでアラート再発が無いか継続監視。

References

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