Vulnerability in Zammad (CVE-2026-34723)
Summary
Vulnerability in Zammad (CVE-2026-34723). Confidential information can be exposed externally. Mitigation: upgrade to 7.0.1 or later.
Original description
The description as published by the source.
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, unauthenticated remote attackers were able to access the getting started endpoint to get access to sensitive internal entity data, even after the system setup was completed. This vulnerability is fixed in 7.0.1 and 6.5.4.
Source: NIST National Vulnerability Database NVD
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-2026-34723 has been found in Zammad.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: upgrade Zammad to 7.0.1 or later.
If unsure, ask your IT team or search "Zammad CVE-2026-34723" on the vendor's site.
CVE-2026-34723 (Zammad) — CWE-284 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 7.0.1 — 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.
A vulnerability (CWE-284) exists in Zammad.
Check the vendor advisory for the affected versions of Zammad.
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally.
Update to 7.0.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Zammad' . 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
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1Identify exposure identify
grep -r 'Zammad' . | 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
Zammadを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade Zammad to 7.0.1ステージング環境で 7.0.1 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。
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3Post-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。