Vulnerability in Netherman Portal del Hermano (CVE-2026-53997)
Summary
Vulnerability in Netherman Portal del Hermano (CVE-2026-53997). Confidential information can be exposed externally. Exploitable via POST /password/create-access.
Original description
The description as published by the source.
Netherman Portal del Hermano (portaldelhermano.es) before 2026-10-06 contains a broken authentication vulnerability in its password-recovery flow at the POST /password/create-access and POST /password/email endpoints, allowing unauthenticated attackers to take over any member account across all tenants by exploiting the lack of rate limiting and distinct error messages that act as oracles for each of the four identity-verification factors (DNI, date of birth, phone number, last four IBAN digits). Attackers can confirm the DNI via the oracle, brute-force the date of birth and IBAN digits, obtain the phone number through open-source intelligence, then submit an attacker-controlled email field so the password reset link is delivered to them, enabling full account takeover including profile data, full IBAN, and fiscal documents.
Source: GitHub Security Advisories (Global) 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-2026-53997 has been found in Netherman Portal del Hermano.
Attackers can target a specific entry point like POST /password/create-access over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Netherman Portal del Hermano CVE-2026-53997" on the vendor's site.
CVE-2026-53997 (Netherman Portal del Hermano) — CWE-307 / CVSS v3 7.4
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: POST /password/create-access / POST /password/email
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.
A vulnerability (CWE-307) exists in Netherman Portal del Hermano. Attackers reach the vulnerable code path via POST /password/create-access without authentication.
Check the vendor advisory for the affected versions of Netherman Portal del Hermano. Attack surface: POST /password/create-access / POST /password/email.
Severity: High (CVSS 7.4/10). Confidential information can be exposed externally.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /password/create-access requests with malformed payloads or SQL meta-characters. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Netherman Portal del Hermano を使っているサービスとバージョンを洗い出す。
-
2Hunt for indicators of compromise detect
grep 'POST /password/create-access' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /password/create-access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。 -
3Post-deployment verification verify
Replay attack against POST /password/create-access 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
- web nvd.nist.gov
- web disclosure@vulncheck.com
- web netherman.app
- web disclosure@vulncheck.com
- web github.com
- web disclosure@vulncheck.com