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BunkerWeb

Nginx-based web application firewall

WAF and hardened reverse proxy based on Nginx, with ModSecurity and the OWASP CRS, bot protection and a web UI, for Docker, Kubernetes or Linux.

Open sourceAGPL-3.0-only
Alternative toCloudflare WAF
Homepage of BunkerWeb
Official website (bunkerweb.io), captured by ThreatWire.

What BunkerWeb does

BunkerWeb puts a security-focused Nginx in front of web services. It enables ModSecurity with the OWASP Core Rule Set, security headers, TLS automation, rate limiting, bad-behaviour bans and bot challenges, configured through environment variables, labels or a web interface.

It integrates with Docker, Swarm, Kubernetes and plain Linux. Bunkerity offers PRO plugins and support on top of the AGPL core.

Key features

  • ModSecurity with OWASP CRS built in
  • Bot challenges and bad-behaviour bans
  • Automatic TLS with Let's Encrypt
  • Web UI and plugin system
  • Docker, Kubernetes and Linux integrations

Licence

AGPL-3.0-only · GNU AGPL v3 · Open source

Open core: BunkerWeb's PRO plugins are commercial.

Checked by ThreatWire against the repository's licence file on 2026-10-20. GitHub detects: AGPL-3.0.

Security of BunkerWeb itself

16 published advisories for BunkerWeb in GitHub repository advisories; the 12 most recent are listed. Keep the tool updated: security tools often run with broad access.

  • GHSA-xcv3-gjwr-rwxwhigh2026-09-21

    Unauthenticated RCE via the BunkerWeb Worker API in the Official Kubernetes Sidecar Configuration

  • GHSA-vqvw-37gh-5w49low2026-09-21

    Cross-Service Custom Configuration Move via Unauthorized Destination

  • GHSA-j2mq-vqhg-c5mrmedium2026-09-21

    Cache Deletion Crosses the Job-Run Permission Boundary

  • GHSA-7w87-8gxh-2x99low2026-09-21

    Service Conversion Permission Bypass in the Fine-Grained API ACL

  • GHSA-cvfx-2ffg-cqmjhigh2026-09-21

    Bypass filename rules via `filename*=` parameter

  • GHSA-78p8-cwrf-35r2medium2026-08-24

    CI: staging reusable inherits all secrets; 14 reusable workflows lack explicit permissions on release/build paths

  • GHSA-j63f-j59c-q626medium2026-07-16

    TOTP recovery codes can be rotated before second-factor validation

  • GHSA-cc8g-89qq-j9vmhigh2026-07-16

    Authenticated remote code execution via malicious plugin upload — arbitrary Python code executed via SourceFileLoader

  • GHSA-rwch-jhxx-cx5flow2026-07-16

    Improper Hostname Validation Allows Outbound Request Redirection (Potential SSRF) via @ Injection in Instance Registration

  • GHSA-q54j-5484-pvjmCVE-2026-75514medium2026-07-16

    rDNS bypass via missing forward-confirmation (FCrDNS) in blacklist, greylist, whitelist and antibot

  • GHSA-79fm-4xj6-pp5ghigh2026-07-16

    Arbitrary File Write/Delete via Path Traversal in BunkerWeb Let's Encrypt API

  • GHSA-4wcx-xgv7-fjq8high2026-07-13

    Security Vulnerability Report: Path Traversal in UI Plugin Refresh

Sources: GitHub repository advisories · checked 2026-10-20.

Categories and tags

WAF and edge protection#waf#nginx#reverse-proxy#docker#modsecurity#security#dnsbl

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