diff --git a/.gitea/workflows/security-scan.yaml b/.gitea/workflows/security-scan.yaml
new file mode 100644
index 0000000..058bd9d
--- /dev/null
+++ b/.gitea/workflows/security-scan.yaml
@@ -0,0 +1,52 @@
+name: Security Scans
+
+on:
+  push:
+    branches:
+      - main
+      - testing
+      - dev
+  pull_request:
+  schedule:
+    - cron: "0 5 * * 1"
+  workflow_dispatch:
+
+jobs:
+  security-scan:
+    name: Trivy & OSV-Scanner
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v7
+
+      - name: Run Trivy Scanner
+        uses: aquasecurity/trivy-action@v0.36.0
+        with:
+          scan-type: fs
+          scan-ref: .
+          scanners: vuln,secret,misconfig
+          severity: CRITICAL,HIGH
+          format: json
+          output: trivy-results.json
+          exit-code: "0"
+
+      - name: Install OSV-Scanner
+        run: |
+          curl -fsSL -o /usr/local/bin/osv-scanner \
+            "https://github.com/google/osv-scanner/releases/download/v2.5.1/osv-scanner_linux_amd64"
+          chmod +x /usr/local/bin/osv-scanner
+
+      - name: Run OSV-Scanner
+        run: |
+          set +e
+          osv-scanner scan source --recursive --format json --output-file osv-results.json .
+          echo "OSV_EXIT=$?" >> "$GITHUB_ENV"
+
+      - name: Ergebnisse & Gitea-Issue erstellen/aktualisieren
+        env:
+          GITEA_URL: ${{ gitea.server_url || github.server_url }}
+          REPO: ${{ gitea.repository || github.repository }}
+          TOKEN: ${{ secrets.SECURITY_TOKEN }}
+          RUN_URL: ${{ gitea.server_url || github.server_url }}/${{ gitea.repository || github.repository }}/actions/runs/${{ gitea.run_id || github.run_id }}
+        run: |
+          python3 scripts/report-security-issue.py trivy-results.json osv-results.json
diff --git a/scripts/report-security-issue.py b/scripts/report-security-issue.py
new file mode 100644
index 0000000..c7b9ebb
--- /dev/null
+++ b/scripts/report-security-issue.py
@@ -0,0 +1,206 @@
+#!/usr/bin/env python3
+"""Erstellt oder kommentiert ein Gitea-Issue mit den Ergebnissen der Security-Scans.
+
+Sucht ein offenes Issue mit dem Label "security-scan". Existiert eines, wird
+der aktuelle Scan-Stand als neuer Kommentar angehängt (die Historie bleibt
+erhalten). Existiert keines (z.B. weil das letzte geschlossen wurde), wird ein
+neues Issue erstellt. Gibt es keine Funde mehr, wird ein offenes Issue nur
+kommentiert, nicht geschlossen.
+"""
+
+import json
+import os
+import sys
+import urllib.error
+import urllib.request
+
+LABEL_NAME = "security-scan"
+LABEL_COLOR = "#b60205"
+ISSUE_TITLE = "Security-Scan: Offene Schwachstellen"
+
+SEVERITY_ORDER = {"CRITICAL": 0, "HIGH": 1, "MEDIUM": 2, "LOW": 3, "UNKNOWN": 4, "-": 5}
+
+
+def api(method, path, token, gitea_url, data=None):
+    url = f"{gitea_url}/api/v1{path}"
+    body = json.dumps(data).encode() if data is not None else None
+    req = urllib.request.Request(url, data=body, method=method)
+    req.add_header("Authorization", f"token {token}")
+    req.add_header("Content-Type", "application/json")
+    try:
+        with urllib.request.urlopen(req) as resp:
+            raw = resp.read()
+            return json.loads(raw) if raw else None
+    except urllib.error.HTTPError as e:
+        print(f"Gitea API Fehler ({method} {path}): {e.code} {e.read().decode()}", file=sys.stderr)
+        raise
+
+
+def load_trivy(path):
+    findings = []
+    if not path or not os.path.isfile(path):
+        return findings
+    with open(path) as f:
+        data = json.load(f)
+    for result in data.get("Results", []) or []:
+        target = result.get("Target", "?")
+        for vuln in result.get("Vulnerabilities", []) or []:
+            findings.append({
+                "source": "Trivy",
+                "id": vuln.get("VulnerabilityID", "?"),
+                "severity": vuln.get("Severity", "UNKNOWN"),
+                "package": vuln.get("PkgName", "?"),
+                "installed": vuln.get("InstalledVersion", "?"),
+                "fixed": vuln.get("FixedVersion") or "-",
+                "target": target,
+            })
+        for misc in result.get("Misconfigurations", []) or []:
+            findings.append({
+                "source": "Trivy (Misconfig)",
+                "id": misc.get("ID", "?"),
+                "severity": misc.get("Severity", "UNKNOWN"),
+                "package": misc.get("Title", "?"),
+                "installed": "-",
+                "fixed": "-",
+                "target": target,
+            })
+        for secret in result.get("Secrets", []) or []:
+            findings.append({
+                "source": "Trivy (Secret)",
+                "id": secret.get("RuleID", "?"),
+                "severity": secret.get("Severity", "UNKNOWN"),
+                "package": secret.get("Title", "?"),
+                "installed": "-",
+                "fixed": "-",
+                "target": target,
+            })
+    return findings
+
+
+def load_osv(path):
+    findings = []
+    if not path or not os.path.isfile(path):
+        return findings
+    with open(path) as f:
+        data = json.load(f)
+    for result in data.get("results", []) or []:
+        source = (result.get("source") or {}).get("path", "?")
+        for pkg in result.get("packages", []) or []:
+            info = pkg.get("package", {})
+            pkg_name = f"{info.get('name', '?')} ({info.get('ecosystem', '?')})"
+            for vuln in pkg.get("vulnerabilities", []) or []:
+                findings.append({
+                    "source": "OSV-Scanner",
+                    "id": vuln.get("id", "?"),
+                    "severity": "-",
+                    "package": pkg_name,
+                    "installed": info.get("version", "?"),
+                    "fixed": "-",
+                    "target": source,
+                })
+    return findings
+
+
+def print_summary(findings):
+    if not findings:
+        print("Keine Funde.")
+        return
+    findings = sorted(findings, key=lambda f: (SEVERITY_ORDER.get(f["severity"], 9), f["id"]))
+    widths = {
+        key: max(len(key), *(len(str(f[key])) for f in findings))
+        for key in ("source", "id", "severity", "package", "installed", "fixed", "target")
+    }
+    header = ("source", "id", "severity", "package", "installed", "fixed", "target")
+    row_fmt = "  ".join(f"{{:{widths[k]}}}" for k in header)
+    print(row_fmt.format(*header))
+    print(row_fmt.format(*("-" * widths[k] for k in header)))
+    for f in findings:
+        print(row_fmt.format(*(str(f[k]) for k in header)))
+
+
+def build_report(findings, run_url):
+    findings = sorted(findings, key=lambda f: (SEVERITY_ORDER.get(f["severity"], 9), f["id"]))
+    lines = [
+        "Automatisch erstellt vom Security-Scan-Workflow.",
+        f"Lauf: {run_url}" if run_url else "",
+        "",
+        "| Quelle | ID | Schweregrad | Paket | Installiert | Fix | Ziel |",
+        "|---|---|---|---|---|---|---|",
+    ]
+    for f in findings:
+        lines.append(
+            f"| {f['source']} | {f['id']} | {f['severity']} | {f['package']} | "
+            f"{f['installed']} | {f['fixed']} | {f['target']} |"
+        )
+    return "\n".join(lines)
+
+
+def ensure_label(token, gitea_url, repo):
+    labels = api("GET", f"/repos/{repo}/labels?limit=50", token, gitea_url) or []
+    for label in labels:
+        if label.get("name") == LABEL_NAME:
+            return label["id"]
+    created = api("POST", f"/repos/{repo}/labels", token, gitea_url, {
+        "name": LABEL_NAME,
+        "color": LABEL_COLOR,
+        "description": "Automatisch verwaltet vom Security-Scan-Workflow",
+    })
+    return created["id"]
+
+
+def find_open_issue(token, gitea_url, repo):
+    issues = api(
+        "GET",
+        f"/repos/{repo}/issues?state=open&type=issues&labels={LABEL_NAME}",
+        token,
+        gitea_url,
+    ) or []
+    for issue in issues:
+        if issue.get("title") == ISSUE_TITLE:
+            return issue
+    return None
+
+
+def main():
+    trivy_path = sys.argv[1] if len(sys.argv) > 1 else None
+    osv_path = sys.argv[2] if len(sys.argv) > 2 else None
+
+    gitea_url = os.environ["GITEA_URL"].rstrip("/")
+    repo = os.environ["REPO"]
+    token = os.environ["TOKEN"]
+    run_url = os.environ.get("RUN_URL", "")
+    osv_exit = int(os.environ.get("OSV_EXIT", "0"))
+
+    findings = load_trivy(trivy_path) + load_osv(osv_path)
+    print_summary(findings)
+
+    open_issue = find_open_issue(token, gitea_url, repo)
+
+    if findings:
+        report = build_report(findings, run_url)
+        if open_issue:
+            print(f"Kommentiere bestehendes Issue #{open_issue['number']} mit {len(findings)} Fund(en).")
+            api("POST", f"/repos/{repo}/issues/{open_issue['number']}/comments", token, gitea_url, {"body": report})
+        else:
+            label_id = ensure_label(token, gitea_url, repo)
+            print(f"Erstelle neues Issue mit {len(findings)} Fund(en).")
+            api("POST", f"/repos/{repo}/issues", token, gitea_url, {
+                "title": ISSUE_TITLE,
+                "body": report,
+                "labels": [label_id],
+            })
+    elif open_issue:
+        print(f"Keine aktuellen Funde mehr. Kommentiere Issue #{open_issue['number']}.")
+        api("POST", f"/repos/{repo}/issues/{open_issue['number']}/comments", token, gitea_url, {
+            "body": f"Aktueller Scan hat keine offenen Schwachstellen mehr gefunden.\n\n{run_url}".strip(),
+        })
+    else:
+        print("Keine Funde und kein offenes Issue vorhanden.")
+
+    has_trivy_findings = any(f["source"].startswith("Trivy") for f in findings)
+    if has_trivy_findings or osv_exit == 1:
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()